45 A
V O L U M E 2 5 , NO. 4, A P R I L 1 9 5 3
OLUME
2 5, N O . 4, A P R I L 1 9 5 3
For Materials with Ultra-Complex Spectra FASTER, MORE ACCURATE ANALYSIS With JAco 3.4 meter Automatic Grating Spectrograph Match this precise JAco Spectrograph against your toughest analytical prob lems. High reciprocal linear dispersion and maximum resolution mean easier and more accurate analyses of ferrous alloys, minerals, high temperature alloys and other materials with highly complex spectra. All-electric automatic operation assures foolproof control while saving time and steps. N o finer spectrograph available for your re search or industrial control applications.
TECHNICAL FEATURES •
High reciprocal persion
linear
dis
( 5 . 0 A m m . Order I; 2 . 4 A m m . Order I I ; 1.6 A m m , Order I I I )
JARRELL-ASH COMPANY
165
•
15,000
•
Automatic electric operation
line/inch
•
Self-feed
NEWBURY
grating
plateholder
ST., B O S T O N
1 6 , MASS.
DETROIT
Shown with JAco V a n s o u r c e , a precise and versatile excitation unit for spectrochemical analysis
HOEPPLER VISCOSIMETER PRECISION MODEL
FALLING BALL
VISCOSITY DIRECTLY IN CENTIPOSES (fromO°Cto100°C) EQUALS Β χ (Sb-Sf) χ Time Β = Ball Constant Sb = Sp. gr. of ball Sf = Sp. 9r. of fluid The Hoeppler Viscosimeter pro vides a fast and accurate method of determining the viscosity of gases, liquids, oils, plastics, syrups, vis cous tars and dark colored liquids. Direct reading in centipoises (or centistokes).From 0.01 to 1,000,000 centipoises. Accuracy 0 . 1 % to 0.5%. Small sample (30cc) re quired. Results consistent and reproducible. Order direct or from leading laboratory supply dealers. Write today for Bulletin HV-303.
LaMOTTE
pH BLOCK
COMPARATOR
This improved LaMotte Unit greatly facilitates simple, ac curate, Hydrogen Ion Control. It is especially recommended for the use of individual oper ators on any step of a process where a definite p H value must be maintained. Even with highly colored or turbid solutions determinations can easily be made with accuracy. The new plastic block comparator is non-corrodible, mois ture-resistant, and has more sharply defined color fields. Complete with any one set of L a M o t t e Permanent Color Standards, together with a supply of the corresponding in dicator solution, measuring pipette and marked test tubes.
LaMOTTE WATER SOLUBLE pH INDICATORS (Sulfon-phthalein series) pH 0.2-9.6
< I I
Manufactured by F I S H - S C H U R M A N C O R P . 72 Portman Road, N e w Rochelle, N . y .
F
s Fish-Schurman
These products were originally developed in the LaMotte laboratories and are of t h e same superior quality as the acid form indicators hitherto available for p H work. They have the distinct advantage of being instantly solu ble in distilled water, hence are easy to convert to solution form. Use of alkali, as required in t h e older technic, is eliminated, and no heating is necessary. The clean quick way to prepare indicator solutions for accurate pH work.
LaMotte Chemical Products Company Dept. " A C "
Towson 4, M d .
