NEW PRODUCTS The present line includes acetone, carbon tetrachloride, chloroform, cyclohexane, methyl alcohol, methylene chloride, and isopropyl alcohol. 2
position of the float to be read. When the position is set the corresponding pressure will be held automatically. Manostat floats are available in two ranges—0 to 10 mm. in W m m . divisions, and 0 to 100 mm. in 1-mm. divisions. Both ranges may be used in the same instrument. 3
Manostat A new absolute and differential control gage, the Cartesian Manostat No. 9, has been developed for the Emil Greiner Co. by the Manostat Corp. The manostat measures as well as controls both absolute and differential pressure. A 100-mm. scale allows the
Amplifier A new amplifier to be used with the company's scintillation and proportional counters has been announced by
North American Philips Co. The new unit incorporates a regulated power supply, linear pulse amplifier, amplitude discriminator, and three highspeed binary counters. Provision is made for the addition of a pulse height analyzer. The new chassis is enclosed in a separate cabinet and is placed on top of the standard electronic circuit panel. The pulse amplifier has a resolving time of 1 microsecond, permitting almost linear counting rates up to 100,000 counts per second. The amplifier maintains the linear relation between pulse height and energy of exciting photons over an energy range of 10 to 1. 4 Spectral Omnirange Lamp
TYGON " -
TUBING
. . . aids process
control
A new laboratory lamp employing 12 imported bulbs is being marketed by George W. Gates & Co., Inc., for applications in optics, radiation physics, spectroscopy, chemistry, and other fields where line radiation is essential.
The glass-like clarity of Tygon Tubing permits instant visual inspection, hence more accurate flow control. Purity of solution is safely maintained because Tygon is chemically inert, nontoxic and non-contaminating. It's easy to handle, too. Flexible but tough, it won't kink or collapse. Tygon Flexible Plastic Tubing is the logical choice for every laboratory application. Required sizes are stocked by laboratory supply houses everywhere.
' r L A
^ . „ FOB S S CUEAB F
T
'
'
M
' I
I
I
voUB
UA A BORATO f V V HOUSE SUI*PI209E
'
U. S. STONEWARE AKRON 9. OHIO
For further information, circle number 84 A on Readers' Service Card, page 79 A
84 A
The twelve bulbs, cadmium, cesium, melium, mercury, mercury-cadmium, potassium, sodium, neon, rubidium, thallium, zinc, and mercury (with a windowlike opening in the outer bulb for short wave ultraviolet), are used interchangeably in one auxiliary operating unit which plugs into any 60-cycle a.c. supply of 110 to 120 volts. The auxiliary is provided with cords for current connection and for connection to the lamp house, which may be raised to desired height or demounted for remote use. A simple adjustment of the control knob sets the current required for the lamp at the proper value as read by the meter on the panel. The line spectrum produced by the entire compliment of lamps is from short wave ultraviolet through the visible into the near infrared. Individual lines may be isolated by use of a filter. The lamps are equipped with prefocus bases For further information, see coupon on page 79 A ANALYTICAL
CHEMISTRY
