I/EC
THERMOCOUPLES THAT WILL WITHSTAND
2000°F AND UP TO 5 0 / 0 0 0 PSI
l
°*G UK
NEW, SIMPLE CONSTRUCTION M a d e from metal sheath over ceramic insulated thermocouple w i r e . M e t a l sheath can b e bent and w e l d ments can b e p e r f o r m e d without loss of insulation. Write f o r
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The most successful of several reaction vessels they tried was a modified Erlenmeyer flask with an internal cooling coil. This was placed so that the light from the solar furnace mirror entered the vessel normal to the conical top and came to a focus inside the space enclosed by the cooling coil. Ice water pumped through the coil was sufficient to keep the tempera ture in the reaction vessel as low as 10° C. By plotting reaction time against oxygen evolved, they were able to demonstrate a zero-order initial re action rate. In other words, even with the light concentration possible
9-6400
3 . 8 for c o m p l e t e t h e r m o c o u p l e s . 4 for A E R O P A K C e r a m i c Insulated W i r e .
Aero Research INSTRUMENT 315
COMPANY,
INC.
N O R T H A B E R D E E N · C H I C A G O 7. ILL. Circle No. 82 on Readers' Service Card
now available with automatic controls . .
"Packaged"
NEPTUNE CHEMICAL FEED UNIT a complete system for precisely additives to continuous flow
SRI's solar furnace
regulating processes
The NEPTUNE proportioning system is precision engineered for accuracy, and a longer operating life. It offers several improved features—including automafic controls—that are not found on many more expensive units. OTHER FEATURES INCLUDE: • Corrosion resistant, stainless steel piston valves and ball checks; heavy gauge construction throughout. • Easy control of feed—simply adjust calibrated scale on the eccentric.
Tank, agitator and pump are combined in one smooth operating system that precisely proportions anything from treating chemicals, such as calgon, to petroleum distillates.
• Constant solution strength is assured as agitator prevents precipitates from settling. • " Y " type strainer protects pump from harmful solids. FOR A D D I T I O N A L
DETAILS — WRITE,
WIRE
OR
CALL:
NEPTUNE PUMP MANUFACTURING CO. 4912
N O R T H 6 T H STREET, P H I L A D E L P H I A
20,
PA.
Circle No. 79 on Readers' Service Card 42 A
INDUSTRIAL A N D ENGINEERING
CHEMISTRY
DAvenport 9-2882
in the solar furnace all of the photochemically active light is absorbed by the eerie ions. The dual function of the solar furnace can be simply expressed. If the concentrated rays from the sun fall on a black body, a high temperature is produced; if they fall on an object or a reaction system which absorbs largely in the visible and ultraviolet parts of the spectrum, little increase in temperature results. Marcus and Wohlers suggest that this aspect of the solar furnace should have some worthwhile appli cations. Industrial photochemical reactions, for example, need a cool
