﻿INSTITUTE OF PHYSIOLOGY
175
INSTITUTE OF PHYSIOLOGY
UNIVERSITY OF COPENHAGEN
Fig. 2
electroosmotic plant of 25 liters capacity per hour was installed in a room in the attic. The water is collected in two hardware tanks each of 175 liters capacity and carried through aluminum pipes to a small number of taps in the different laboratories. The working of the electroosmotic apparatus has, however, been unsatisfactory and a steam-still with quartz cooling tubes has been installed instead.
Sinks are provided in most of the rooms. These are of several types, but in most cases large acid-proof sinks of white stoneware are installed. A new type of sink has been designed and appears to be very useful especially for cleaning purposes. It is made from “martinite” (artificial slate) in a framework of teak and the inside is completely covered with rubber vulcanized on to the martinite.
In addition to the sinks there is generally a waste pipe of 4 cm diameter with vertical tubes of 17 cm length and 2.7 Cm in diameter at suitable intervals running along the wall at the level of the wainscoting, but with a slope of 1 in 300 and ending over a sink in the floor or in a room below.
Gas is provided from the city supply. As the gas pressure varies from 7 to 10 cm, pressure regulators have been put in, but have proved rather inefficient.
Electricity is supplied from the city as 220 volt direct current. The difference in price of electricity for light and power purposes has necessitated the installation of separate meters, wiring, and contact points which have to be different on the two systems. The availability of the current for laboratory purposes is thereby considerably reduced. From the laboratory of biophysics special circuits carrying current at 2, 4, and 6 volts are run to a certain number of terminals in the laboratories and on another circuit alternating current at 127-220 volts and with fifty periods per second, or accumulator current at from 10 to 120 volts in intervals of 10 V. can be supplied.
There is an automatic internal telephone system common to all the laboratories and a system of electric clocks driven from a central clock in the biophysical laboratory. This is arranged also to signalize seconds over the wires for variable current.
Air is compressed by the automatic machine described