charge of the weaving or spinning department in question shall read the thermometers thrice in the day, namely, between seven and eight o'clock in the forenoon, between ten and eleven o'clock in the forenoon and between three and four o'clock, except in rooms which are lighted by gas, and then between four and five o'clock, in the afternoon of every day on which any persons are employed in any weaving or spinning department, and he shall record the readings of each thermometer in such department at each of the said times upon a form provided for the purpose, which, together with the regulations relating thereto, shall be furnished by the state board of labor and industries. The records of the readings shall not be destroyed until they have first been seen by an inspector of the state board of labor and industries in whose district the factory is situated, and then not without his knowledge and consent.

SECTION 2. Section one shall not apply to textile factories already equipped with, or which become equipped with, such a number and type of standardized self-registering hygrometers or psychrometers, or hygrometric system, as meet the approval of the state board of labor and industries, provided that the manner of using the same is approved by an inspector of the state board of labor and industries in whose district the factory is situated, and provided that the records of the readings from the said hygrometers, or hygrometric system installed, are not destroyed without the knowledge and consent of said inspector.

SECTION 3. Section one shall not apply to textile factories the occupier or manager or person in charge of which makes use of the sling hygrometer with the express purpose of quickly and accurately determining the actual moisture and temperature of a weaving or spinning department as frequently and in such a manner as is approved by an inspector of the state board of labor and industries in whose district the factory is situated, and provided that the records of the readings from the use of the said hygrometer are not destroyed without the knowledge and permission of said inspector.

SECTION 4. No owner, occupier or manager or person for the time being in charge of a textile factory shall permit the relative

humidity in a weaving or spinning department in the textile factory under his control to exceed the following limits:

SECTION 5. Water used for humidifying purposes in a textile factory shall be taken either from a public supply of drinking water, or from some other source of pure water, or from a supply of water which, although in the opinion of the state board of labor and industries not suitable for drinking purposes is sufficiently free from impurities as not to be dangerous to the health of employees when used for humidifying purposes; and all ducts for the introduction or distribution of humidified air shall be kept clean.

SECTION 6. This act shall be enforced by the inspectors of the state board of labor and industries under the supervision of said board. Whoever fails to comply with the provisions contained herein after being requested so to do by an inspector of the state board of labor and industries shall be fined not more than fifty dollars for each offence.

SECTION 7. To provide for the expenses necessary in carrying out the provisions of this act, in connection with and in addition to the duties provided for by chapter five hundred and thirtyseven of the acts of the year nineteen hundred and seven, there may be expended out of the treasury of the commonwealth annually a sum not exceeding one thousand dollars in addition to the five thousand dollars provided for by section seven of said chapter five hundred and thirty-seven.

DANGEROUS MACHINERY.

GUARDING, COMMUNICATION, ETC.

Acts of 1909, Chapter 514, Section 94, amended by Acts of 1912, Chapter 318, Acts of 1913, Chapter 806, Section 13, and by Acts of 1914, Chapter 328.

Guarding of Machinery. - SECTION 2. The belting, shafting, gearing, drums and all machinery having movable parts in all factories, mechanical establishments, workshops and mercantile establishments if so placed as, in the opinion of the state board of labor and industries, to be dangerous to employees therein while engaged in their ordinary duties, shall be, so far as is practicable, securely guarded. No machinery except steam engines in a factory, mechanical establishment, workshop or mercantile establishment shall be cleaned while running if objection in writing is made by one of the inspectors of said board.

SECTION 3. Nothing in this act shall be construed as applying to the belting, shafting, gearing, drums or machinery used in the operation of elevators, nor in any way as affecting the powers of the board of elevator regulations given by chapter eight hundred and six of the acts of the year nineteen hundred and thirteen.

Acts of 1909, Chapter 514.

Communication with Engineer's Room.-SECTION 91. In every manufacturing establishment in which the machinery is propelled by steam, communication shall be provided between each room in which such machinery is placed and the room in which the engineer is stationed by means of speaking tubes, electric bells or appliances to control the motive power, or such other means as shall be satisfactory to the inspectors of the state board of labor and industries, if in the opinion of the inspectors such communication is necessary. Whoever, being the occupant or controlling the use of any such manufacturing establishment, violates the provisions of this section shall forfeit to the commonwealth not less than twenty-five nor more than one hundred dollars.

SECTION 92. No prosecution for a violation of the provisions of the preceding section shall be commenced until four weeks after notice in writing by an inspector has been sent by mail to

such person, firm or corporation of any changes necessary to be made to comply with the provisions of said section, nor if such changes shall have been made in accordance with such notice.

Acts of 1909, Chapter 514, Section 101.

Protection from Flying Shuttles. — Any person, firm or corportion owning, managing or operating factories in this commonwealth in which looms are employed shall equip the looms with such guards or other devices as will prevent injury to employees from shuttles falling or being thrown from the looms. Such guards or devices shall be made of such material and placed in such manner as shall be approved by the state board of labor and industries, who are hereby directed to enforce the provisions of this section. Whoever violates any provision of this section shall be punished by a fine of not more than one hundred dollars for every week during which such violation continues.

Acts of 1909, Chapter 514, Section 95.

Traversing Machinery in Cotton Factories. The owner of a cotton factory which shall have been erected subsequently to the twenty-eighth day of May in the year eighteen hundred and ninety-six, in which there is any traversing carriage of a selfacting mule installed, or of any cotton factory erected previously to such date in which hereafter such traversing carriage is installed, who permits such carriage to travel within twelve inches of any pillar, column, pier or fixed structure, shall be punished by a fine of not less than twenty nor more than fifty dollars for each offence.

Acts of 1909, Chapter 514, Section 96, amended by Acts of 1913, Chapter 806, Section 13.

Hatchways and Other Openings to be protected. -- The openings of hoistways, hatchways and well holes upon every floor of a factory or mercantile or public building shall be protected by sufficient trap doors or self-closing hatches and safety catches, or such other safeguards as the inspectors of the state board of labor and industries direct; and due diligence shall be used to keep such trap doors closed at all times, except when in actual