rm is a platform scale supporting the water-meter,
with plug valve and handle conveniently placed for emptying the meter.
The absorption system is placed on a special table conveniently situated
with regard to the balance for weighing the absorbers. The large balance
used for weighing the oxygen cylinders is directly across the center
aisle and the analytical balance for weighing the U-tubes for residual
analysis is near by.

[Illustration: FIG. 1.--General plan of respiration calorimeter
laboratory.]

[Illustration: FIG. 2

General view of laboratory room taken near the main door. At the extreme
right is the absorber table, and back of it the bed calorimeter. In the
immediate foreground is shown the balance for weighing absorbers. A
sulphuric acid absorber is suspended on the left hand arm of the
balance. At the left is the observer's table and back of it the chair
calorimeter with a large balance above for weighing subjects. On the
floor, to the left, is the water meter for weighing water used to bring
away heat.]

[Illustration: FIG. 3

General view of laboratory taken near the refrigeration room. The
observer's table is in the immediate foreground with water balance at
the left, and chair calorimeter with balance for weighing man at the
extreme left. At the right of the observer's table is the absorption
system table, and on the wall in the rear the temperature recorder. At
the right is shown the balance for weighing absorbers, and back of that
the case surrounding the balance for weighing oxygen.]

[Illustration: FIG. 4

General view of laboratory taken near the temperature recorder. The bed
calorimeter is at the right, the absorber table in the immediate
foreground, back of it the chair calorimeter and observer's table, and
at the left the balance for weighing absorbers. Near the ceiling are
shown the ducts for the cold air used for temperature control.]

[Illustration: FIG. 5

View of laboratory taken from the entrance of the bed calorimeter, with
balance for weighing oxygen cylinders at the left. The structural steel
skeleton of the calorimeter for long experiments is at the right and
sections of the copper lining are in the rear, resting against the
wall.]

Another view of the laboratory, taken near the door leading to the
refrigeration room, is shown in fig. 3. At the right is seen the balance
used for weighing absorbers, and back of it, imperfectly shown, is the
case surrounding the balance for