Bauhaus-Universität Weimar

Reports of Visits to Foreign Laboratories, vol. 4 (1923) [Illustrated Typoscript in 7 volumes] Reproduced with the kind permission of Dr. Cecil E. Leith
Benedict, Francis Gano
The Cambridge School of Agriculture. 
Dr. Capstick, Dr. Deighton, and. Mr, Morgan 
The main object of our visit to Cambridge was to see the calorimeter 
begun by A. V. Hill and completed by Capstick in the agricultural 
building. This apparatus is an extraordinarily accurate calorimeter. There 
are as yet absolutely no provisions for ga3 analysis, either oxygen, carbon 
dioxide, or methane, but only heat. The water is determined by wet and dry 
bulb thermometers in the ingoing and outgoing air. The fact that the water 
must be reasonably well detemined, however, is borne out by the fact that 
the alcohol check experiments published by Cap3tick are very accurate. 
The calorimeter is a huge affair with an enormous mass of metal. 
A very indistinct, unsatisfactory photograph (see figureS/) was taken 
by means of a piece of burning, metallic magnesium ribbon, but this 
photograph gives an idea of the construction of the chamber, the grating 
at the rear, the trough for the pig to feed out of at the left, and the 
heat absorbing pipes at the top. There is also a large coil of very heavy 
lead pipe outside of the can, of which Mr. Capstick complained a great 
deal, owing to the mass of metal. A photograph of the front of the 
calorimeter, with the door closed, is given in figure SI?. This view shows 
the heavy insulated construction of the door and the air pipes leading 
into the chamber, with two thermometers for wet and dry bulbs. It was 
extremely difficult to photograph this apparatus, owing to the laboratory 
Figures ^ and °\0 are photographs taken at the rear of the chamber, 
showing the manometer for indicating the flow of air through the chamber, 
a recording photographic registration apparatus below, indicating 
manometric pressures, and various other physical connections for the thermo 
elements and resistance thermometers. The ventilating blower is seen at 
the extreme left, lower corner, in figure


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