118 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1907. 
respective chambers after the line is cast. In the linotype machine 
this is effected by a V-shaped distribution bar the sides of which have 
a series of grooves that engage teeth corresponding to them on the 
sides of each matrix. The arrangement of the teeth varies on each 
matrix and the position of the grooves likewise varies on the dis- 
tributing bar above the compartments of the magazine. The ap- 
paratus is so designed that as the matrix is pushed along the distribu- 
ting bar, when it reaches its proper channel, nothing prevents it 
from dropping 
into its compart- 
ment in the maga- 
; zine. We here find 
a vl iti, Vas pen ews 
ie EO aT Ors | toe whe 
aw SC feeler” = which, 
in Baudot’s tele- 
graphic machine, 
by means of a 
combination — of 
five levers, prints 
each letter at the 
moment when the 
type wheel car- 
Tons rying the letter 
brings it into a vertical 
position. This is not the 
only mechanical similar- 
ity between composing 
eras pour machines and multiple 
GR ces vicmes. telegraphs, for few ma- 
scale chines are more involved 
one with the other than 
those used in rapid teleg- 
raphy and typography. 
val us wanes | The motive force neces- 
pemee sary to work a linotype 
Fies. 6 and 7.—Details of molding mechanism of machine is less than half 
Rate a horsepower. The speed 
of composition is normally 5,000 ems or characters per hour, and 
may attain, with skilled operators, 6,000 to 7,000 ems per hour. 
A single operator manipulates the machine. One caretaker can 
clean and keep in order five or six machines. On the other hand, cor- 
rections necessitate the complete making over of the line, and, as in 
similar machines, the mental strain on the operator is incomparably 
greater than that felt by the hand compositor. Not only must he read 
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