Bauhaus-Universität Weimar

Department of Physiological Chemistry, University of Pennsylvania, School of Medicine
Wilson, Wright
and is ventilated by an individual electric fan of ade¬ 
quate capacity controlled by a switch at the hood. 
This modern method of hood ventilation eliminates 
most of the difficulties which arise in connection with a 
system consisting of a few ventilating fans under the con¬ 
trol of the building engineer. Besides the equipment 
on the laboratory desks, each hood contains a steam- 
heated water-bath. 
The double-unit laboratories are similarly equipped, 
some with and some without permanently installed, 
free-standing chemical desks. Four of the double-unit 
laboratories assigned to the professor and assistant 
professors communicate with offices. Several labo¬ 
ratories have direct as well as alternating current out¬ 
lets. Distilled water is piped in block tin pipes to all 
the laboratories. 
Six units are set aside for animal work and include a 
room for dogs, two rooms for small animals, an operating 
and a food preparation room, all with intercommunicat¬ 
ing doors. The food preparation room contains a 
Grinnell dryer, a grinder, an autoclave, work-tables, and 
storage cans for dry foods. In this room are placed also 
a Buchner press and a large centrifuge. 
An excellently equipped departmental library opens 
off the general office of the department. A small fire¬ 
proof vault may be entered from one corner of the li¬ 
brary. A seminar room is available for staff meetings, 
graduate student seminars, and other class conferences. 
In addition to a photographic dark room there is a 
dark room of sufficient size for work with a spectro¬ 
photometer, polarimeter, etc. A warm room main¬ 
tained at 37° C by thermostatically controlled electric 
heating units is available for work on digestion, etc. 
One unit is divided into two constant temperature rooms 
one of which is dark. A unit is used for refrigeration, 
the outer part containing eight refrigerator compart¬ 
ments which may be assigned to individuals and kept 
locked, and the inner part consisting of a cold room. 
Here, besides shelves for storage, is a small laboratory 
desk equipped with compressed air, vacuum, cold water, 
and electricity. The cold room with its laboratory 
desk has proved to be the most-used special room in the 
department. Laboratory work, sometimes for hours 
at a time, has been carried out here in connection with 
studies on hemoglobin, tissue analysis, etc. A large 
portable centrifuge may be wheeled in and centrifuga¬ 
tion carried out in the cold. Besides the fixed labora¬ 
tory table, a movable table has been brought in to 
accommodate the various workers. If the room be¬ 
comes more congested some of the storage shelves will 
be removed and additional table space provided. 
Small completely equipped chemical desks are also 
available in the warm room, the dark room, and the 
constant temperature rooms. A one-unit laboratory 
contains equipment for varieties of special work. In 
this room is a dialyzing tank, a large hood with sliding 
windows for experiments with chemicals having espe¬ 
cially dangerous vapors, a laboratory desk fitted with 
several outlets connected with a special high-vacuum 
pump. All the electric outlets in this room are con¬ 
trolled by switches in the hall outside so that the dis¬ 
tillation of inflammables may be carried out with the 
maximum precautions against fire. Another room is 
equipped with Kjeldahl digestion and distillation 
One unit is used at present for storage of precision 
apparatus. A large centrally located storeroom con¬ 
tains the ordinary apparatus and chemicals needed for 
research. Besides the adjustable steel shelving and 
bins, there is a free-standing cabinet of 100 drawers 
containing much of the small equipment. Most of the 
drawers arc 18 inches from the front to back but some 
are 36 inches and are used to store burettes, pipettes, 
condensers, etc. Several telephones and an efficient 
call system save much time in keeping the staff in touch 
with the janitors, dieners, etc. 
The fourth floor contains student laboratories and 
accessory rooms. The large laboratory containing 
about 7,000 square feet is built to accommodate 154 
students at one time though the classes at present are 
not that large (Fig. 0). As the room is on the top floor 
of the building, posts were eliminated by attaching 
the ceiling to roof trusses that are supported only by 
the outside walls. The spacing of desks is unusual for 
a large laboratory. The desk unit consists of working 
spaces for four students, two on each side, with a sink 
between each pair. Three of these units extend across 
the room with narrow aisles between and with wide 
aisles at the sides of the room. There are gas outlets 
on the desks and cold water outlets at the desk sinks. 
Hot, cold, and distilled water are piped to four large 
sinks in the corners of the room. Each student has a 
working space 4 feet long and 2 feet deep and is assigned 
two drawers and a locker. One drawer is long to take 
burettes, condensers, pipettes, etc., and the other is 
short, alternating with the drawers on the opposite side. 
Two sets of drawers and lockers are under each labora¬ 
tory desk, thus permitting the room to be used for two 
separate classes. The desk tops are of stone and the 
cabinets are of wood. Along the walls at each side of 
the laboratory extend extra working-tables with hoods 
between each window. On account of the large win¬ 
dow spaces, the hoods are small and have one side cut 
out to allow apparatus to extend onto the adjoining 
table tops. Such an arrangement also permits the use of 
water, electricity, and vacuum in the hood by running 
lines from the nearby outlets and eliminates the neces¬ 
sity of filling the floor space of the hood with this equip¬ 
ment. For this reason only gas outlets are placed in 
the hoods. Adequate ventilation permits the use of


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