ANALYTICAL
34 A
CHEMISTRY
COORS Volcanus
Klett
Combustion Tube For economical service in industrial l a b o r a t o r i e s Unglazed throughout. Thoroughly vitrified and impervious to gases. S u i t a b l e for h i g h t e m p e r a t u r e c o m bustion use.
Photometers
May be used to 2900° Fahrenheit, and over, depending upon the load, span and time interval.
Klett-Summerson
E x c e l l e n t f o r c a r b o n a n d sulphur determinations.
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COORS U.S.A
Internationally
«J* S Inside it Size Diameter i No. Inches
*7Ue Klett
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Outside Diameter Inches
Wall Thickness Inches
24 in.
Overall Lengths 27 in. 30 in. 33 in. Price each
_ 36 in.
I 1 V 1 " V $6.25 S $7.85 $ $ i 2 V IV V 6.80 8.40 Î3 1" IV V 7.10 7.85 8.65 9.40 10.50 Ι 3Α I V IV V 7.35 8.40 9.15 10.20 11.00 ;• 4 IV IV V 7.85 10.20 : i 4A I V IV V 8.90 11.50 *; Tubes of 24" overall length; lengths of reduced end 2-3 16 inches. h Tubes of 30" overall length; lengths of reduced end 3-1 8 inches. ;• Ont-tidp rlinmi>t*>r of rnnctrii-tfsn 1 onA 3
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COORS PORCELAIN C O M P A N Y GOLDEN, COLORADO
COLEMAN Certified
BUFFER TABLETS
Ko. 2070
Designed for the rapid and accurate determina tion of thiamin, riboflavin, and other substances which fluoresce in solution. The sensitivity and stability are such that it has been found particularly useful in determining very small amounts of these substances.
KLETT SCIENTIFIC PRODUCTS ELECTHOPHORESIS APPARATUS · BIO-COLORIMETERS GLASS ABSORPTION CELLS · COLORIMETER NEPHELOMETERS · GLASS STANDARDS · KLETT REAGENTS
Klett
always fresh, always accurate COLEMAN
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PRECISE . . . Coleman Buffers are accurate, because they are always fresh. These dry tablets can't deteriorate and change pH as liquids do . . . Certified Buffer Tablets are accurate to 0.02 pH at all times . . . available from 2.00 pH to 11.80 pH in steps of 0.20 pH . . . each tablet makes 100 ml of buffer. C O N V E N I E N T . . . You can store a wide range of Buffer tablets in a small space . . . have fresh, accurate buffer always at hand. E C O N O M I C A L . . . Low initial cost, and freedom from spoilage make Coleman Certified Buffer tablets the economical, depend able w a y to use buffers. For full d e t a i l s w r i t e f o r B u l l e t i n A B - 2 0 5
Manufacturing C o .
179 EAST 87TH STREET, NEW YORK, Ν. Υ.
COLEMAN INSTRUMENTS
318 MADISON ST. MAYWOOD, ILLINOIS
