PHOTOVOLT Corporation HENGAR®GRANULES

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You get more of the better things first from FOR EXAMPLE, Flat to prevent rocking

Tops and bottoms color-coded

Sturdy, glazed reinforcing bead top and bottom eliminates chipping

BETTER

Kimax Culture Dishes Better because . . ."hard" glass assures the economy of long service life. Provides a dish with inert surfaces for optimum culture growth. Colorcoded for easy, sure sorting.

Markings stand up under repeated autoclaving

0.6 mm max. head projection.

Heel area criticul... process designed for uniform glass distribution with adequate corner radius

Flat to prevent rocking

KIMBLE

OWENS-ILLINOIS maker of Kimble Products Toledo 1. Ohio

Circle No. 191 on Readers' Service Card

PHOTOVOLT LINE-OPERATED SUPER-SENSITIVE ELECTRONIC

MULTIPLIER-PHOTOMETER For the exact measurements of extremely low light values d o w n to 1 / 1 0 , 0 0 0 microlumen . . . f o r absorp­ tion a n d flame photometry. Colorimetry t h r o u g h microscopes. Scintillation measurements on crystals. Fluorescence trace analysis. Monochromatic color densitometry. M e a s u r i n g high densities on micro areas. Light measurements t h r o u g h telescopes.

MOD. 520-M

HENGAR

GRANULES

prevent " b u m p i n g " of boiling liquids

Write for Bulletin # 3 6 0 to

PHOTOVOLT Corporation 1115 B r o a d w a y

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N e w York 1 0 , Ν . Υ.

Circle No. 88 on Readers Service Card 7 0 A

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ANALYTICAL CHEMISTRY

Two or three insoluble Hengar Granules in the flask or test tube prevent superheating, with its erratic and dangerous "bumping" vaporization. Won't contaminate solution; speeds distillation; pre­ vents boiling losses; gives sharp fractions; reduces flask breakage. Two types: Plain, for any lab procedure involving boiling; Selenized, for Kjeldahl nitrogen determina­ tion. Plain: 100 grams $1; 250 grams $1.75; 500 grams $2.75. Selenized: 100 grams $2.40; 250 grams $4.90; 500 grams $7.90. Ask your dealer or write

HENGAR C O M P A N Y

6825 Greenway Ave., Philadelphia, P a . 19142 Phone (215) 724-0800 . A division of Henry TKOEMNER, Inc. Circle No. 153 on Readers' Service Card