+-------+--------+--------------------+-------+------------+---------+ | Hood: |Position|Date................|Date................| | | Refer-| of | | | | | ence | Anemo- |External |External | | |Number.| meter. |Conditions..........|Conditions..........|Remarks. | +-------+--------+-------+-----+------+-------+-----+------+---------+ | | | |Speed|Volume| |Speed|Volume| | | | |Area of| F. | C.F. |Area of| F. | C.F. | | | | |Throat.| p.m.| p.m. |Throat.| p.m.| p.m. | | +-------+--------+-------+-----+------+-------+-----+------+---------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-------+--------+-------+-----+------+-------+-----+------+---------+ Frequent cleaning and inspection of exhaust installations are very important, as accumulation of dust greatly impedes the flow of air at all points of the system. The person employed in cleaning the fan should wear a respirator. Hoods and ducts should always be cleaned with the exhaust in full action. REFERENCES. [1] Annual Report of the Chief Inspector of Factories for 1910, p. 172. [2] _Ibid._, pp. 172, 173. [3] G. ELMHIRST DUCKERING: A Report on an Experimental Investigation into the Conditions of Work in Tinning Workshops, and Appendices. Included in Special Report on Dangerous or Injurious Processes in the Coating of Metal with Lead or a Mixture of Lead and Tin. Cd. 3793. Wyman and Sons, Ltd. Price 1s. G. ELMHIRST DUCKERING: The Cause of Lead Poisoning in the Tinning of Metals. Journal of Hygiene, vol. viii., pp. 474-503, 1908. G. ELMHIRST DUCKERING: Report on an Investigation of the Air of Workplaces in Potteries. Included as Appendix XLIX. in Report of the Departmental Committee appointed to inquire into the Dangers attendant on the Use of Lead, and the Danger or Injury to Health arising from Dust and Other Causes in the Manufacture of Earthenware and China, vol. ii., pp. 93-113, 1910. Cd. 5278. Price 1s. 9d. [4] G. ELMHIRST DUCKERING: Annual Report of the Chief Inspector of Factories for 1910, p. 47. [5] C. R. PENDOCK (one of H.M. Inspectors of Factories): Report on Systems of Ventilation in Use in Potteries. Included as Appendix XLVIII. in vol. ii. of Potteries Committee’s Report referred to under[3]. C. R. PENDOCK: Second Report of the Departmental Committee appointed to inquire into the Ventilation of Factories and Workshops, part i., and especially part ii., 1907. Cd. 3552 and 3553. Price together, 4s. 8d.