18. _Food, &c._—No person shall introduce, keep, prepare, or partake of any food, drink (other than any sanitary drink provided by the occupier and approved by the Appointed Surgeon), or tobacco in any room in which a lead process is carried on. 19. _Washing._—No person employed in a lead process shall leave the premises or partake of meals without previously and carefully cleaning and washing the hands. 20. _Baths._—Every person employed in the manipulation of dry compounds of lead or in pasting shall take a bath at least once a week. 21. _Interference with safety appliances._—No person shall in any way interfere, without the concurrence of the occupier or manager, with the means and appliances provided for the removal of the dust or fumes, and for the carrying out of these Regulations. These Regulations shall come into force on the 1st day of January, 1904. White Lead (See also pp. 131 and 132) In the manufacture of white lead processes which create dust are specially dangerous, namely, emptying the corrosion chambers, drying and grinding, transport of the material in the form of powder, and packing. The following measures are called for: emptying the chambers should only be done by men wearing respirators or equipped with breathing helmets after preliminary damping of the corrosions by means of a spray. Use of a vacuum cleaning apparatus suggests itself. Drying should be done as far as possible in stoves charged mechanically, the temperature in which can be watched from the outside; grinding must be done in closed and ventilated mills; transport of the dried material should be effected by mechanical means or vacuum apparatus, and packing should be done in mechanical packing machines. Further, cleanliness and strict discipline are essential. Alternation of employment is advisable. The question of substitutes for white lead is referred to on p. 293. Manufacture of red lead calls for precisely similar preventive measures. Charging and emptying the oxidising furnaces should be done under efficient exhaust ventilation. Conveyance, sifting, and grinding of the cooled material requires to be done in the same way as has been described for white lead. In the production of chrome colours (lead chromates) besides the danger from lead the injurious action of chrome has to be borne in mind. Regulations for white lead factories have been made in Germany, Belgium, and Great Britain. We give below the German Imperial Regulations dated May 26, 1903. REGULATIONS FOR MANUFACTURE OF LEAD COLOURS AND LEAD PRODUCTS