Science . venient source ofheat which can be regu-lated as desired. Oper-ating expense is negligible,the hot plates are per-fectly safe, and they shouldlast as long as the labor-atory. Dr. Freas spentseveral years working outthe practical problemswhich arose in connectionwith these hot plates. Asat present constructed,they are highly satisfac-tory and have already beeninstalled in several newlaboratories. DESCRIPTION. The hot plate is 24 inchesFreas Hot Steam Plate under Laboratory Hood. long bv I inches bed plate is of brass to which copper tubing is attached. The copper tubingcarrie
Science . venient source ofheat which can be regu-lated as desired. Oper-ating expense is negligible,the hot plates are per-fectly safe, and they shouldlast as long as the labor-atory. Dr. Freas spentseveral years working outthe practical problemswhich arose in connectionwith these hot plates. Asat present constructed,they are highly satisfac-tory and have already beeninstalled in several newlaboratories. DESCRIPTION. The hot plate is 24 inchesFreas Hot Steam Plate under Laboratory Hood. long bv I inches bed plate is of brass to which copper tubing is attached. The copper tubingcarries the steam and is suitable for any working pressure. Lead is pouredaround the tubing. Lead is used for this purpose to distribute the heat andbecause it is practically unattacked by laboratory fumes. By means of a trapthe condensed steam is drained back to the boiler. The plate is mounted onfour legs, 9 inches high. Price of the hot plate complete with valve traps andJ/2 inch steam pipe connections $
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Keywords: ., bookcentury1800, bookdecade1880, booksubjects, booksubjectscience
