Weighing is t h e heart of all analytical procedure
To keep balance
pace with
increased
laboratory
manufacturers have developed
work
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€
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loads
balances
that
weigh faster, are easier to operate and require no op erator technique. The NEW Christian Becker Model NA-1 single pan, semi-automatic
balance
provides
everything
the chemist has wanted. Fast accurate weighings are as easy as 1 - 2 - 3. 1. Place sample on p a n , close d o o r , select " r o u g h
450
2 . W e i g h t control knobs " B " a r e then r o t a t e d . W e i g h t indicator lights " C " indicate if weights
9 8 7 65 4 3 2 1 0
c o r d e d o n n e w , l a r g e , easy t o r e a d reticle and vernier, a f t e r fine weighing b e a m is put • • • • •
ι
in use. This ten thousand division o p t i c a l r e a d out " D " is absolutely unique. It eliminates completely " b a l a n c e squint." The l a r g e num ber a t the t o p plus the vertical line show that
• ••••1 • ••••1
the w e i g h t is b e t w e e n . 4 5 5 a n d . 4 5 0 g r a m . By f o l l o w i n g the line d o w n , i t makes a solid
ACTUAL
SIZE
rectangle a t " 4 " , thus giving a r e a d i n g o f . 4 5 5 4 . This plus the w e i g h t
TEN THOUSAND DIVISION OPTICAL READOUT N e w , l a r g e , easy to r e a d reticle a n d
it also includes many other features: • External zero
adjustment—temperature
compensation
have to be added or removed. 3 . Final 1 0 0 0 mgs., o r a n y p a r t thereof a r e r e
••••• ••••• ••••• • ••••• ~ ••••• •••••
ANYONE CAN OPERATE THIS BALANCE
w e i g h i n g " b e a m b y r o t a t i n g knob " A " .
recorded on
counter " E " , gives t o t a l w e i g h t o f sample.
• O i l d a m p i n g — longer " P a n - t o - S H r r u p " dimension • Exclusive t w o - b e a m construction—one for rough w e i g h i n g — o n e for fine • Weighing and pilot lights to indicate beam in use • Stainless steel Class M weights • Knobs for weights a n d beams are at con venient table height • Weight counter a n d reticle a n d vernier are at eye level.
Capacity 2 0 0 grams. Sensitivity .1 mg. Readability .05 m g . Catalog # H 1 8 3 0 . . . Price $ 1 , 1 8 5 . 0 0 (4 page bulletin a v a i l a b l e on request)
vernier eliminates Balance squint.
HARSHAW SCIENTIFIC HARSHAW
Division of The Harshaw Chemical Company
·
Cleveland 6, Ohio
Sales Branches and Warehouses: Cincinnati 1 3 , O . · C l e v e l a n d 6 , O . · Detroit 2 8 , M i c h . Houston 1 1 , Tex. · Los A n g e l e s 2 2 , Calif. · Philadelphia 4 8 , P a . Sales Offices: Baton Rouge, La. · O a k l a n d 1 1 , Calif. · Buffalo 2 , Ν . Υ. Hastings-On-Hudson 6 , Ν . Υ. · Pittsburgh 2 2 , P a . For further information, circle number 18 A on Readers' Service Card, page 77 A 18 A
•
ANALYTICAL CHEMISTRY
