A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams . /.,?„,/..„ /?„/,/,.,/,,,/ /., ?//„.„,„.. /;•„,;.;./ /,-•„„„./,. 1,1,ww/ ww;. C H E M I S T It Y. 553 rings may be placed according to pleasure. Be-low these rings is a fountain lamp, on Argandsplan, which also slides on the main brass rod bymeans of a socket and thumb-screw. This lampmay be used for producing any degree of heatthat the operator requires,
A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams . /.,?„,/..„ /?„/,/,.,/,,,/ /., ?//„.„,„.. /;•„,;.;./ /,-•„„„./,. 1,1,ww/ ww;. C H E M I S T It Y. 553 rings may be placed according to pleasure. Be-low these rings is a fountain lamp, on Argandsplan, which also slides on the main brass rod bymeans of a socket and thumb-screw. This lampmay be used for producing any degree of heatthat the operator requires, from a very gentleone up to the high temperature requisite for dis-tilling mercury. Fig. 2. Instrument for directing the Va-por of Alcohol on Flame, a, A hollow spherefor containing alcohol, resting upon a shoulderin the ring o. b, A bent tube with a jet at theend, to convey the alcohol in the state of vaporto the flame at q; this tube is continued in theinside up to c, which admits of a being nearlyfilled without any alcohol running over, d, Asafety valve, the pressure of which is determinedat pleasure, by screwing higher or lower on thepillar e, the two milled nuts f and g, carrying thesteel arm h, which rests on the valve. /, Anopening for putting in the alcohol, k, The lampwhich adjusts to different distan
Size: 1163px × 2148px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade, booksubjectaeronautics, bookyear1829
