Bauhaus-Universität Weimar

Titel:
Reports of Visits to Foreign Laboratories, vol. 1 (1907) [Illustrated Typoscript in 7 volumes] Reproduced with the kind permission of Dr. Cecil E. Leith
Person:
Benedict, Francis Gano
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39744/301/
Chemie ul : .luraV^ of the ' wh -. i Uh, 
Prof* Bertrand and Pr. Abt. 
This chemical laboratory is remarkably well equipped, " ... 
lava tops for the tables. Especially noteworthy is the fact that 
the experimental tables do not extend clear to the floor, thus 
apparently giving more sanitary and hygienic conditions, A 1 
view oi ehe laboratory is given in Fig. 90» A system in use in 
tnis laboratory which is well worth copying is to keep standard 
stock pieces of apparatus, such as Kipp generators, water baths, 
drying ovens, distilling apparatus for vacuum, set up in wort in- 
order on a special table in the laboratory. These can be used by 
individuals ’without the necessity of having each person setting up 
the whole outfit whenever it is desired for use. Throughout the 
laboratory, use is made of the Poux regulator for gas ovens. The 
drying was almost invariably done in dry hydrogen at 108°. 
For Bunsen burners, especially for burners permanently located 
in apparatus, rubber tubing was disposed with and fine couper tubing, 
coiled so as to be quite flexible, was permanently connected with 
the gas main with male and female screws. This system was likewise 
^ery common_-y used on many of the laboratory desks and tables, 
as can be seen in Fig. 9C, the burner beneath the water bath is con¬ 
nected with the gas directly back of it in the photograph by a long 
■•■end oi copper tube. The rubber tube at the left supplies water to 
the water bath and the idea in using the copper tubing is to insure 
against risk of fire when leaving the burners, as, for instance, duri 
the noon hour. It is maintained that the copper coil is sufficiently 
flexible and the connections so rapidly made that it is of the greatest 
adv~nt-ge to use this type of connection between burner and gas supply.
        

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