Sonotone Corporation 
Elmsfo 
Mr. R. Haywood 
Sonotone of He. 
Hashing ton, D. 
Dear ¥oody: 
I have checked with our Engineering Department and they say if your user Mr. Vialdo 
is going to wear his 1200 on the body under clothing, the instrument will always 
be at body temperature and there is no chance that the instrument will be affected 
by cold weather . Vhen the instrument is exposed mo cold weather then onere is 
a possibility that the instrument be break down since this is not thermostat 
compensated. However, under n orm al wearing conditions, there is nothing to worry 
about. Best wishes. 
0 . . .. 
Sincerely^ 
\ crvv-^ — * 
Assistant Manager 
Sales Division 
. .-,r f tp* ■■ ... 
WE’RE WITH YOU 
IN '62 
SONOTONE SALES PROMOTION TEAM 
* 
I 
