Bauhaus-Universität Weimar

Reports of Visits to Foreign Laboratories, vol. 1 (1907) [Illustrated Typoscript in 7 volumes] Reproduced with the kind permission of Dr. Cecil E. Leith
Benedict, Francis Gano
not burn well} leucin 'gurus mudh tetter; out glutaminie acid turns with 
very great difficulty. 
The fora of tomb used in all of these contrast 1 ns is that of 
Berthelot, modified hy Kroeker. It is made by Julius Peters of Ber'Jn, 
is lined on the inside with enamel but has a platinum lining to 'be lib. 
The cubical contents are not far from that of the bombs in use i; rid¬ 
dle town but the calorimeter and the cover are all in one piece and much 
lighter than those of the Berthelot-Atwater bomb calorimeter. hr. 
Wrede told me that a Kroeker bomb had burst in Zurich. I be’li¬ 
the iron had taken fire where the enamel had ehipped off and 'he bomb 
had burned a hole inside and blown out. I did not understand 1 
there hgd been an explosion and the whole apparatus destroyed. 'Ll 
my return to America, Mr. Carpenter tells me that he has seen n ao a', 
of a bomb that burst in some European city.) 
The hydrothermal equivalent of the bomb and water system as used 
by Fischer is 4,660 calories, nearly twice as large as that with the 
Berthelot-Atwater bomb calorimeter. 
Filling with oxygen.—The bombs are filled with highly e--.* • .■.-•-.s-d 
oxygen obtained from one of the local factories in nerlin. . m.-nonet- 
which is very accurate and with exceedingly good valves enables the 
cylinder to be emptied to a very low pressure. The manometer arrange¬ 
ment is shown in Fig. 9ft, as is also shown the pellet press. This 
manometer arrangement and two steel cylinders have been ordered for 'he 
Nutrition Laboratory. 
temperature measurements-»—The temperature measurements . .e 
whôlly with electrical methods. A resistance thermometer constructed 
by Heraeus of platinum encased in a fine copper tube is used. This 
therm meter is shown lying in an inclined position on the table in 
Fig. 95. The fine copper tube is coiled something like a hook and th<


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