processes, this data may be used to calculate basic thermo- 
dynanue quantiienes!Oa7 SOlUtEMOn mecessary for design. BPE 
can also be used to check other experimentally obtained 
data or presently available semi-empirical and empirical 
expmessHons | fon mixed ellectrolytes lake sea water.)  Borling 
poumey elevation data, for actual sea water 2s aliso important 
because there has been no experimental determination other 
than the present work. All the previous estimations have 
been based on NaCl or synthetic sea water. The objective 
of this work was to obtain data for boiling point elevation 
of sea water at various concentrations and temperatures at 
relatively short intervals of concentration and temperature 
which would be useful in obtaining accurate correlations and 
MM Ee SHUN Le VIOUS vex Sting correlations. It appears 
thatethere is a large discrepency in the values predicted 
by currently available correlations. In order to obtain 
these data, the apparatus, the development of which was 
DReWAMOUSy deseribedi(2).) was used. See) Fagure 15; The 
ieCHSeeEronmlett to right ane a imatrogen: cylinder; ballast 
drum with pressure controls and heater controls beneath 
the-boidane jporntvapparatus proper. — At the right is the 
RecOnden.  wavehiCOmenols:, quartz) thermometer, digital 
analogue converter, and potentiometer beneath. Since the 
Range wOL this apparatus) vs! Limited in pressure, a new 
apparatus (Figure 16) has been designed and built and is 
now being tested. The experimental data obtained so far 
with natural sea water encompass a concentration of from 0 
to twice normal concentration, and a temperature range of 
SO mntomlz0rG. 
Experimental Procedure, Old Apparatus 
Equipment: A few minor but critical changes have been 
made of the apparatus prevaouslyideseribed (2) 2) These 
modifications include changes of some glass parts with 
metal parts to enable operation at higher pressures, 
incorporation of a flow-through sampler, and change of 
gasket material. 
Operation: 
Solution Preparation - The sea water used in this 
work was obtained through the Scripps Institution of 
Oceanography, La Jolla,’ Calafornia., The Pacific Ocean 
water, from about 800 feet off-shore, is pumped from a 
point midway between the ocean floor and ocean surface 
(about 6' from the surface), collected and delivered in 
Zminceriplasitac DOttles mine sph of (theysea water 1s 
43 
