low relative humidity ΛΒΟΙΊΪ: Aiireoriiycin and penicillin are packed in this ""Sterile Area"' at Lederle Laboratories.

ΜϊΙ^ΟΗ": These two Lecrlroilryers hold lli<* air, at 6 % relative humidity in this area.

Control the quali ty of air surrounding processes, just as you control materials going into products . Leclerle Laboratories Division of American Cyanamid Com­pany consider this an essential rule for quality product ion. Besides sterilizing the air, they hold it a t a constant tempera­ture and low humidi ty .

Lectrodryers DRY the air fed to these areas, working with automat ic controls to hold moisture a t the desired low level.

Are high humidit ies hampering your

production—interfering with the flow of materials, slowing down drying opera­tions, causing chemical reactions to go as t ray? Mois tu re c o n t a m i n a t e s every­thing it touches, spoiling many a product in process and storage.

Lectrodryers remove t ha t moisture, working at atmospheric or high pressures, DRYing air, gases and organic liquids. For DRYing help , wri te P i t t s b u r g h Lectrodryer Corporation, 305 32nd St., Pittsburgh 30, Pennsylvania.

In England: Birlec, Limited, Tyburn Road, Erdington, Birmingham. In Australia: Birlec, Limited, 51 Parramatta Road, Glebe, Sydney.

UECTRODR«RS W

W ,TH ACT.VATIO AU..MNAS LCCTRODRYER REGISTERED TRADEMARK U.S. PAT. OFF

1938 C H E M I C A L A N D E N G I N E E R I N G N E W S