NEW PRODUCTS
GET PURE MONOCHROMATIC LIGHT AT LOW COST with Bausch & Lomb
INTERFERENCE FILTERS values measured are converted into electric values. Viscosity values are expressed in centipoises. P-15
D o e s your w o r k
PASS BAND CHARACTERISTICS OF INTERFERENCE FILTERS λ T_ HW
Precision Balance The new Sartorious precision bal ance, called the Kilomat and handled by Brinkmann, lets the operator read the weight within seconds after re leasing the beam. With a load range of 3000 grams, the entire mechanism is enclosed in metal housing. Controls are close together, and no manipulation of weights is needed for samples below 1000 grams. P-16
WAVELENGTH OF PEAK TRANSMITTANCE AT PEAK HALF WIDTH
specific
spectral
regions?
T h e s e inexpensive perma nent filters permit you to pinpoint
light
transmit
tance to the desired w a v e length. Their narrow band pass assures high spectral purity. Many filters in the 340πΐμ,-800ηΐμ
Induction Furnace Burrell Corp. will market a new Combustron, a high frequency furnace for carbon and sulfur. It handles full factor weights of granular or pin-type samples, yielding hot, fluid fusions that push out carbon or sulfur with speed and accuracy. The Combustron can be used in a horizontal or vertical position, depend ing on whether the analyst prefers boats or crucibles. For carbon work, a built-in catalyst tube serves for con verting from the monoxide to the di oxide. P-17
require
transmittance of light of
range
are
standard stock; others (in cluding
Infra-red filters )
are available o n special or der. Find out h o w easy they make it to control light to your needs. WAVELENGTH DIFFERENCE IN mp
•
WRITE for detailed Data
W i d e selection for specific wavelengths,
Brochure D-248. Bausch &
340m/j.-800m f t •
N a r r o w band pass, 8ιημ. to 25min
•
Infra-red filters available on special
Lomb Optical Co., 6 0 9 4 1 St. Paul Street, Rochester 2, N e w York.
order
TRANSMISSION TYPE INTERFERENCE FILTER
BAUSCH & LOMB SINCE
Thermo-recording balance
18 5 3
America's only complete optical s o u r c e . . . from glass to finished product.
Circle No. 29 on Readers' Service Card VOL.
3 1 , NO. 5, MAY 1959
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91
A
