¬ volume of water which the said generators contain. In multi¬ flecting plates 8 are employed to hold the gases in contact tubular steam generators so constructed, however— in particu¬ with the tubes, thus insuring the abstraction of heat thereby. lar in the marine type — variations in pressure are… … of Havre, France, have patented in this country the improve¬ PIERPOINT’S WATER-TUBE BOILER. ment in the celebrated Normand boiler shown by figs. 4 and 5, which consists in connecting two such boilers together and for supplying steam to one engine the regular distribution of working them in couples.…
