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July 22, 1916
ACCESSORY NEWS SECTION
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CARBONS
WHY NOT TRY THE
SILVER TIP D. G. NEGATIVE PROJECTOR CARBON?
(Patent applied for)
This carbon is the most revolutionary improvement discovered in many years, for projection work. Its small size and superior composition give you
1. Whiter light for less current.
2. A minimum of deposit in the lamp house.
3. A perfect crater at all times.
4. Quiet and steady burning of the arc.
5. Less heat in lamp house and operating room.
For 25 to 50 amperes D. C. use j f« ^ National Cored Upper ^ I 5/16 X 6 Silvertip Solid Lower
■c^^ cn AC ^^^^^^^ n n / M x 12" National Cored Upper For SO to 65 amperes D. C. use | {^^^^ x 6" Silvertip Solid Lower
■c^, AC 4-^ in ^^^^^^^ n n / % x 12" National Cored Upper For 65 to 70 amperes D. C. use | ^y^^ x 6" Silvertip Solid Wer
•P 7n cc r> r ..^^ / ■% x 12" National Cored Upper
For 70 to 85 amperes D. C. use | ^ ^„ giivertip Solid Lower
rr^ cc t„ im n r / 1 x 12" National Cored Upper
For 85 to 100 amperes D. C. use | ^ ^„ sii^^^tip Cored Lower
These small negative carbons require a special ADAPTOR for use in the holder of present lamps. STEEL ADAPTORS must not be used because their resistance is high, which results in heating, short life, and excessive needling.
WE HAVE DESIGNED A SPECIAL BRONZE ADAPTOR, WHICH WE WILL FURNISH FREE OF CHARGE TO USERS OF OUR CARBONS
These carbons and adaptors will be shown at our booth at the Chicago Convention, July 10th to 18th.
Be sure to visit our booth and see an actual demonstration of these carbons burning in the lamp.
Manufactured only by
NATIONAL CARBON COMPANY
CLEVELAND, OHIO
-Jf you like; the " NeWs,".' wilte our advertisers; if not, 'ttU us.