10 A
ANALYTICAL
CHEMISTRY
ANNOUNCING
THE PIROS-GLOVER FRACTIONATING STILL Patents Pending Developed at Sinclair Refining Company by J. J. Piros and J. A. Glover, this versatile still has proven particularly valuable for precise fractionation of low boiling substances mixed with heavier compounds. Noteworthy features are: • Complete vacuum jacketing — kettle to receiver. • Column with head is a single jacketed unit. • Solenoid valve drains graduated receiver. stick or contaminate distillate.
No stopcock to
• Dividing dripper and cold finger reflux condenser lift out for easy cleaning or replacement. • Knock-back condenser prevents loss due to revaporization after take-off. • Differential manometer aids in maintaining constant boil-up rate, helps detect flooding. • Efficient fractionation at low or high temperature. M-8430 Piros-Glover Fractionating Still Complete as illustrated, made of "PYREX" brand glass, column 10 mm., 13 mm., or 19 mm. I. D. by 600 mm. long, with tantalum spider to support packing but without packing. Each $340.00 M-8400 Piros-Glover Fractionating Column Column with head only of M-8430, vacuum jacketed and stripsilvered, T29/42 joint for kettle, f 19/38 on take-off. Each $185.00 M-8410 Piros-Glover Fractionating Column with Olders h a w Bubble P l a t e s Similar to M-8400 but with 30-plate Oldershaw column incorporated. See our advertisement in January Analytical Chemistry. Each $355.00 Other sizes or modifications are available to meet your needs. * Manufactured under exclusive license agreement with Sinclair Refining Company, East Chicago, Indiana.
We manufacture a complete line of standard taper glassware and a precision line of high vacuum stopcocks, joints, and other items requiring unusual accuracy. A specially trained staff of highly skilled glassblowers and the most modern glassworking machinery are available to construct your apparatus of special design.
H·
S·
MARTIN
&
COMPANY
Scientific Glassware • Apparatus Specialties 1916-1920
GREENLEAF
STREET
.
EVANSTON,
ILLINOIS
