Bauhaus-Universität Weimar

Titel:
L. E. Knott Apparatus Company: Scientific Instruments, Catalogue 26
Person:
Knott, L. E.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit13684/48/
SCIENTIFIC INSTRUMENTS 
43 
22-10 
22-20 
22-30 
22-40 
22-50 
22-60 
22-61 
22-70 
22-72 
22-80 
22-90 
22-100 
22-110 
ACTION AND REACTION 
PENDULUM BALLS 
(Used by special permission of copyright owners) 
Nos. 22-10 to 22-110 
WOODEN BALLS: 
a 
b 
c 
d 
Diameter, inches. . . 
. M 
1 
ix 
2 
Price............. 
$0.10 
$0.15 
$0.25 
$0.30 
GLASS BALLS: 
a 
b 
c 
Diameter, inches. . . 
• K 
1 
IX 
Price............. 
$0.10 
$0.15 
$0.45 
IVORY^B ALLS, accurately turned, polished, and with a hole drilled for suspension: 
a b c 
Diameter, inches. ... 1 1X 2 
Price........... 
. . . $2.00 $2.50 
$3.00 
LEAD BALLS, made of cast metal, drilled for suspension: 
a b 
C 
d 
Diameter, inches. 
... H % 
l 
IX 
Price........... 
. . . $0.10 $0.15 
$0.25 
$0.65 
BRASS BALLS, accurately turned, polished, drilled for suspension: 
* 
a b 
c 
d 
Diameter, inches. 
... 'A % 
1 
IX 
Price........... 
.. . $0.15 $0.30 
$0.50 
$1.25 
IRON BALLS, cast, a, b, 
and c drilled for suspension; d and 
e with hooks. 
a b 
c 
d 
e 
Diameter, inches. 
... % i 
ix 
2 
3 
Price........... 
. . . $0.20 $0.25 
$0.60 
$0.80 
$1.25 
MASSIVE IRON BALL 
WITH THREE HOOKS....... 
$1.70 
HIGHEST GRADE STEEL BALLS, hardened, accurately ground and polished. 
There are no 
holes, but the small balls may be suspended by shellacking 
a thread to them. 
a b 
c 
d 
e 
f 
Diameter, inches. 
.% X 
% 
1 
IX 
2 
Price........... 
... $0.06 $0.10 
$0.20 
$0.30 
$0.60 
$2.00' 
STEEL BALL, with loop attachment for suspension, 1-inch diameter..... 
.75 
FINISHED LIGNUM-VITAE BALL, 1 % inches in diameter........... 
.65 
COPPER BALLS, not turned but drilled for suspension: 
a b c 
Diameter, inches. % 1 1X 
Price.............. $0.22 $0.45 $1.25 
CORK BALLS, lathe turned, and drilled for suspension: 
a b c 
Diameter, inches. % 1 \X 
Price.............. $0.09 $0.15 $0.25 
COMBINATION SET OF BALLS, for use in collision experiments, giving a variety of weights with 
approximately the same size. The set consists of lj^-inch balls of cork, ivory, lignum-vitae 
glass, iron, brass, copper and lead.....................................................Set 7.60
        

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