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/lit13684/110/
SCIENTIFIC INSTRUMENTS 
105 
EXPANSION OF MATTER 
65-10 
65-11 
65-12 
65-13 
65-14 
COWEN’S LINEAR EXPAN¬ 
SION APPARATUS for the 
rapid measurement of linear 
expansion of solids. The solid 
is a tube, one end of which is 
free to move as it is expanded by 
heat from steam passed through 
the tube. This expansion is 
greatly multiplied by the multi¬ 
plying device and can be accur- 
rately read from the graduated 
dial. Constructed of metal 
throughout. Complete as illus¬ 
trated, with one brass tube.....$5.50 
STEEL TUBE for use with above...... 
ALUMINUM TUBE for use with above. 
BRASS TUBE as used in above....... 
GLASS TUBE for use with above...... 
No. 65-10 
No. 65-27 
65-16 GLASS RESERVOIR AND STIR¬ 
RER. (See National Physics 
Direction Sheets, Exp. H023)...... 
65-22 LEVER FORM LINEAR EXPAN¬ 
SION APPARATUS, metal con¬ 
struction throughout, for measuring 
the linear expansion of a solid (a 
rod). Expansion is caused by heat 
from steam introduced into the 
metal jacket. The expansion is 
determined by a multiplying lever, 
the long arm of which moves over a 
scale. Complete as illustrated, with 
one brass rod................... 
$0.95 
.75 
.55 
.40 
.50 
7.75 
65-27 
MICROMETER SCREW FORM LINEAR EXPANSION APPARATUS, metal construction 
throughout, for measuring the linear expansion of a solid (a rod). Expansion is caused by the heat from 
steam introduced into the metal jacket. The expansion is measured directly from the reading of the 
micrometer screw. Complete as illustrated, with one rod..................................... 9-EC 
No. 65-30 
65-30 IMPROVED LEVER FORM LINEAR EXPANSION APPARATUS for measuring the linear 
expansion of a solid (a rod). The steam jacket rests on an insulating support, obviating errors due 
to radiation. Expansion is determined by a multiplying lever, the long arm of which moves over a 
scale. Complete as illustrated, with one brass rod........................................... 9.35 
65-45 ALUMINUM ROD for use with Nos. 65-22 to 65-30..........................................55 
65-46 IRON ROD for use with Nos. 65-22 to 65-30................................................ .45 
65-70 BRASS TUBE AND POINTER. (See Millikan, Gale & Bishop, Exp. 15)....................... 1.65 
No. 65-17 
65-17 COWEN’S COMPENSATION APPARATUS for demonstrating the effect of multiple bars of differ¬ 
ent coefficients of linear expansion as employed in compensation or compound pendulums. Consists 
of an Expansion Attachment No. 65-18 and the metal rest and multiplying device of Expansion 
Apparatus No. 65-10. As steam enters from a steam boiler, the tube reached first by the steam 
expands, causing the pointer to make a movement to the left; when steam reaches the second tube 
which has the greatest coefficient of linear expansion, the pointer moves to the right, back to and 
well beyond the zero point; when steam reaches the third tube, the pointer moves back to the left, 
stopping at zero. Complete as illustrated................................................... 8.76 
65-18 COWEN’S COMPENSATING ATTACHMENT for use with No. 65-10 Linear Expansion Apparatus. 
The expansion bars (three tubes) are held together by two clamps on the same principle as the 
multiple bars are held in the compensated pendulum......................................... 3.80 
COMPENSATING PENDULUM. See No. 17-60.
        

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