2. Pipes to be designated. In all refrigerating plants the pipes in the engine room shall have conspicuous signs, displayed at proper places, designating in easily legible letters the name of the refrigerating chemical contained therein.

3. Rules. In all refrigerating plants there shall be posted several copies of a brief set of rules satisfactory to the fire commissioner, directing all employees as to their duties in case of fire or other emergencies. Employers shall be responsible for the proper drill of all employees in such emergency duties.

4. Supervision. No refrigerating plant using ammonia or carbon dioxide as a refrigerant, nor any refrigerating plant using over eight pounds of ethyl chloride or eight pounds of sulphur dioxide as refrigerants, shall be operated unless under the charge of a person holding a certificate of qualification issued by the police department. Any person holding a certificate of fitness to operate a refrigerating plant issued by the fire commissioner prior to the time when this ordinance takes effect shall be exempt from its provisions until the expiration of such certificate.

5. Certificate of qualification. Upon the request of any person who makes application to the police department for a license or certificate as engineer of any class or grade, or as to such applicant's qualifications to operate such a refrigerating plant, he shall be examined by said department as to his qualifications to operate a refrigerating plant, and if he is found to be so qualified, said department shall so certify; such certification to continue in force one year unless sooner revoked or suspended. Adopted June 12, 1917. Became effective June 26, 1917.

$221. Exemptions. 1. Surplus storage.-Refrigerating plants may store a surplus stock of the refrigerating chemical of two cylinders or, if necessary, a quantity not to exceed ten per cent. of the charge of the plant. No cylinders containing gas under pressure shall be stored in the boiler room.

2. Refrigerating machines of less than three tons capacity. The fire commissioner may exempt from the provisions of this article refrigerating machines of less than three tons refrigerating capacity, provided a certificate of approval has been issued for such machine.

(This article was added by ordinance May 25, 1915.)

ARTICLE 19

NITRO-CELLULOSE

Sec. 230. Manufacture.

§ 231. Guncotton.

232. Nitro-cellulose products.

233. Scraps and other refuse materials.

234. Fire prevention.

Sec. 230. Manufacture.-No person shall manufacture any guncotton, soluble cotton or any other product of nitro-cellulose.

8231. Guncotton.-No person shall transport, store, sell, use or otherwise handle guncotton in any form, either alone or in combination with any other substance intended to be used as:

(a) A blasting explosive, except in the manner provided in article 4 of this chapter;

(b) A propelling charge except in the manner provided in article 5 of this chapter.

§ 232. Nitro-cellulose products. 1. Permit.-No person shall store or keep, manufacture or sell any nitro-cellulose product, as defined in § 1 of this chapter, or manufacture any article therefrom without a permit.

2. Restrictions. No permit for the storage of nitro-cellulose products, except in quantities less than 100 pounds, for purposes of manufacture of articles therefrom, shall be issued for any building:

(a) Which is situated within 50 feet of the nearest wall of any building occupied as a school, theatre, or other place of public amusement or assembly;

(b) Which is occupied as a tenement house, dwelling or hotel;

(c) Which is artificially lighted by any means other than electricity; (d) Which is of wooden construction;

(e) Which is not equipped with an approved system of automatic sprinklers;

(f) Where paints, varnishes or lacquers are manufactured, stored or kept for sale;

(g) Where matches, rosin, turpentine, oils, hemp, cotton, or any explosive, are stored or kept for sale.

3. Storage of raw material. All nitro-cellulose products in the form of blocks, slabs, sheets, rods, tubes or other shapes to be used as raw material shall be kept stored in a fireproof room or compartment, constructed in accordance with plans submitted to and approved by the fire commissioner and in all cases shall be provided with suitable ventilation,

4. Supervision. All premises used for the storage of nitro-cellulose products, or for the manufacture of articles therefrom shall be continuously under the care and supervision of one or more persons, each holding a certificate of fitness as superintendent or manager thereof. number of persons required to hold such certificates shall in each case be stated in the permit.

The

5. Water-jet. Whenever, in the process of manufacturing articles from nitro-cellulose products, saws or cutting tools are used which are likely to heat the material to the firing point by friction or otherwise, a jet of water shall continuously play upon the point of contact.

§ 233. Scraps and other refuse materials. 1. Fire-proof receptacles.— No permit for the manufacture of any article composed wholly or in part of nitro-cellulose products shall be issued for any premises which are not equipped with an approved metal receptacle or container; and all scraps, cuttings, shavings, sawdust and other refuse material of such products shall at frequent intervals be collected and placed in such receptacle and kept continuously immersed in water.

2. Removal. No person shall store or keep scraps, cuttings, shavings, sawdust or other refuse material of nitro-cellulose products in quantities greater than 350 pounds; and all such scraps, cuttings, shavings, sawdust and refuse material shall be immediately removed and transported beyond the city limits.

3. Traffic in. No person shall collect scraps, cuttings, shavings, sawdust or other refuse material of nitro-cellulose products for the purpose of removing the same from the place of manufacture without a permit. The provisions of this subdivision shall not apply to persons holding permits issued pursuant to § 232 of this chapter, but, in any case, all such material shall be placed in containers of substantial construction, and not more than 2,000 pounds thereof shall be transported as a single wagon or truck load.

§ 234. Fire prevention. 1. Exposed flame or spark.-No heat other than steam or hot water, and no stove, forge, torch, boiler, furnace, flame or fire and no electric or other appliance likely to produce an exposed spark shall be allowed in any room or compartment used for the storage of nitro-cellulose products, or in any room or compartment used for the manufacture of articles therefrom.

2. Fire-pails. No permit for the manufacture of articles from nitrocellulose products shall be issued for any premises which are not equipped with at least 1 fire pail to every 2 persons employed therein; and all such pails shall be kept continuously full of water.

Sec. 240. Permit.

§ 241. Restrictions.

ARTICLE 20

INFLAMMABLE MOTION FILMS

§ 242. Storage-rooms. 243. Work-rooms.

244. Fire prevention.

245. Projecting machines.

246. Transportation.

Sec. 240. Permit.-No person shall store or keep on hand any inflammable motion-picture films in quantities greater than 5 reels, or aggregating more than 5,000 feet in length, without a permit. (Amend. June 22, 1915.)

§ 241. Restrictions.-No permit for the storage of inflammable motionpicture films shall be issued for any building

(a) Which is situated within 50 feet of the nearest wall of any building occupied as a school, theatre, or other place of public amusement or assembly;

(b) Which is occupied as a tenement house, dwelling or hotel;

(c) Which is artificially lighted by any means other than electricity; (d) Which is of wooden construction;

Which is not equipped with an approved system of automatic sprinklers;

(f) Which does not contain one or more separate rooms used exclusively for the storage of such films. (Amend. June 22, 1915.)

§ 242. Storage-rooms.-A room, vault or compartment used for the storage of inflammable motion-picture films shall not be artificially lighted except by electric lights having air tight bulbs, globes or tubes encased in suitable wire cages and fitted with keyless sockets. (Amend. June 22, 1915.)

§ 243. Work-rooms. 1. Construction and fittings.—All examining, repairing or piecing together of inflammable motion-picture films shall be done in a room used for no other purpose and separated from the rest of the building by fireproof partitions and self-closing fireproof doors. All furniture and fittings in a room where inflammable motion-picture films are repaired or pieced together shall be of metal or other fireproof material.

2. Quantity of film permitted. Not more than 10 reels, nor more than 10,000 feet in the aggregate of motion-picture films, shall be under examination or repair at one time; and each reel of films shall be kept in a tightly closed metal box when not being examined or repaired.

3. Receptacles for waste. Each room used for the repairing or piecing together of inflammable motion-picture films shall contain a metal can, wherein all waste parts and scraps of such films shall be placed and kept covered with water.

4. Supervision. All storage, manufacturing, repairing and examination of inflammable motion-picture films shall be under the direct supervision of one or more persons holding a certificate of fitness from the fire commissioner; such persons shall be charged with the enforcement of section 8 of this chapter prohibiting smoking. (Amend. June 22, 1915.)

§ 244. Fire prevention. 1. Storage of cements.-No collodion, amyl acetate or other similar inflammable cement or liquid in quantities greater than 1 quart shall be kept in a room where inflammable motionpicture films are stored, or repaired. Premises wherein inflammable motion-picture films are stored, manufactured, repaired or examined shall be equipped with a number of sand and water buckets and fire ex

tinguishers satisfactory to the fire commissioner.

1915.)

(Amend. June 22,

2. Heating appliances. No heat other than steam or hot water, and no stove, forge, torch, boiler, furnace, flame or fire, and no electric or other appliance likely to produce an exposed spark shall be allowed in any room used for the storage or repair of inflammable motion-picture films. § 245. Projecting machines.-No inflammable motion-picture film shall be used in any moving-picture projecting machine not enclosed in an approved booth. (Amend. June 22, 1915.)

$246. Transportation.-No person shall transport inflammable motion-picture films in any underground subway train, or carry the same into any underground subway station, provided, however, that the provisions of this paragraph shall not apply to inflammable films transported in the course of interstate commerce in railway baggage or express cars under the jurisdiction and subject to the regulations of the interstate commerce commission. No person shall transport inflammable motion-picture films in any street car, elevated train, omnibus, ferryboat or other public conveyance, or carry the same into any railway station or ferryhouse unless each film shall be separately enclosed in a tightly closed metal box. Not more than 8 films so enclosed shall be carried at one time by any person. (New. Ord. June 22, 1915.)

Sec. 250. Permit.

ARTICLE 21

DISTILLED LIQUORS AND ALCOHOLS

§ 251. Restrictions.

§ 252. Storage.

§ 253. Distillation or rectification.

Sec. 250. Permit.-No person shall manufacture distilled liquors, spirits or alcohols of any kind, by distillation or rectification, without a permit, nor shall any person store or keep distilled liquors, spirits or alcohols of any kind, in quantities aggregating more than 10 barrels, of 50 gallons each, without a permit.

§ 251. Restrictions.-No permit shall be issued for the manufacture, distillation, rectification, or storage, of distilled liquor, spirits or alcohols, in any building

(a) Which is situated within 50 feet of the nearest wall of any building occupied as a hospital, school, theatre or other place of public amusement or assembly;

(b) Which is of wooden construction;

(c) Which is not equipped with an approved fire extinguishing system. $252. Storage.-No person shall store distilled liquors, spirits or alcohols of any kind in excess of 1 barrel for each 4 square feet of floor space; and barrels containing liquors, spirits or alcohols shall not be stacked more than two high.

§ 253. Distillation of rectification.-No person shall distill or rectify liquors, spirits or alcohols in any room or compartment in which there is an open flame. (New. Ord. May 25, 1915.)

Sec. 255. Permit.-No person shall store or keep on hand any oil, fat, grease or soap stock, exceeding the equivalent of 5 barrels,

without a permit; provided that a person who holds a permit, issued in conformity with the provisions of article 8 or article 23 of this chapter, shall not be required to obtain a permit for the storage and use of such oils, fats, greases and soap-stock as may be incident to the business conducted thereunder. No person shall store upon any floor of a building any oil, fat, grease or soap-stock exceeding in weight one-third the safe bearing capacity of the floor, as certified to by the bureau of buildings, or covering when contained in barrels or other containers more than two-thirds of the floor space of such floor.

§ 256. Restrictions.-No permit shall be issued for the storage of oils, fat, greases or soap-stock in any building or premises—

(a) Which is situated within 50 feet of the nearest wall of any building occupied as a school, hospital, theatre, or any other place of public amusement or assembly;

(b) Which is occupied as a tenement house or hotel;

(c) Which is occupied as a workshop or factory, except such workshop or factory be incident to the business of the applicant;

(d) Which is of wooden construction, except in sparsely populated districts, where it shall be within the discretion of the fire commissioner;

(e) Which is not equipped with a fire extinguishing system satisfactory to the fire commissioner;

(f) Where matches or any explosives are stored or kept.

Sec. 260. Permit.

ARTICLE 23

TECHNICAL ESTABLISHMENTS

§ 261. Supervision. $262. Restrictions.

Sec. 260. Permit.-No person shall maintain or operate a technical establishment, as defined in § 1 of this chapter, without a permit. Each such permit shall prescribe the maximum quantity of explosives, inflammable or combustible materials and substances to be stored, the method of storing and using the same, and the necessary rules for the handling thereof, as well as the number of persons required to hold certificates of fitness.

261. Supervision.-No permit shall be issued under this title unless the establishment shall be continuously under the care and supervision of one or more persons, each holding a certificate of fitness as a superintendent or manager thereof.

§262. Restrictions.-No person shall store for use, or to use in any technical establishment any liquid acetylene, acetylide of copper or other metallic acetylide; fulminate of mercury, or any other fulminate or fulminating compound; nitroglycerine; chloride of nitrogen; amide or amine; blasting powder; smokeless powder; or gunpowder in any form; or any volatile product of petroleum (except rhigoline) having a boiling point lower than 60° F.