Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . arency and comparative richnessof the milk. Lac-varnish. One made fi-om shellac dissolvedin alcoliol. Colore{l by red, orange, or yellow mat-ters, Lac is obtained from the Fifus indica, and the)iroilnct is sliel- hie, serd-Iac, sliclloe, and Inc-lake. Ladder. 1. A frame — usually movable — hav-ing a series of steps attached to side-bars or varieties ar
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . arency and comparative richnessof the milk. Lac-varnish. One made fi-om shellac dissolvedin alcoliol. Colore{l by red, orange, or yellow mat-ters, Lac is obtained from the Fifus indica, and the)iroilnct is sliel- hie, serd-Iac, sliclloe, and Inc-lake. Ladder. 1. A frame — usually movable — hav-ing a series of steps attached to side-bars or varieties are distinguished by their purposes,position, or by some feature of construction. A hiddcr ilifiers from a stairs in that the latterhas treads and lisers, being thus in ladder has merely steps. Of the nautical ladders, we have, —Acconinioeleition-XaAHiKi:CoHi^\\({^\M\i\f\\Quartcr-\ , .%7-)j-ladder. As to purpose, we have, —\\\\-M\i{(i-\M\i\vv. The names denoting con-struction are, —C/(n/) , LADDER-CARRIAGE. 1245 LAG-SCKEW. The coUapsimj- laddtr (Fig. 2784) has roundspivoted to thf side-rails, recesses in wliiuh receivethem when the ladder is foldeil. When the side-pieces are drawn apart, the rounds assume a hoiizou-tal position. A movable ladder is sometimes used in ascendingand descending sliafts. Two poles ascend and de-scend alternately, and have stages on to or fromwhich the pei-son steps from or to the correspondingstep on the other |)ole, at the moment when theybecome stationary. See JI.\N-EXf;iNK. Scaling-ladders are shown in the triumphal monu-ments of Rameses II., the great Sesostiis, 1355 B. c. The tiist ladiler of record was that seen by Jacobin his dream, and it is the longest and best of whichwe have any account. It is the only
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