5,442 results

... pitch to be sure of firm attachment. Heat glass and block slcwly to prevent cracking, apply pitch to both, and press glass onto block. When using rough emery inspect the lens frequently ...

... the upper surface near the edge of the glass block by making a dot with ink where the ... What is the index of refraction of the glass block furnished_by the demonstrator? b. The determination of ...

... Weights and Measures, Tables of, French, Wooden filtering-blocks, Working glass, 54 . 209 220 36 40 41, 252 252 ...

... be of granite, brick, vitrified brick, blocks of glass, blocks of PRESERVATION OF MEDICO-LEGAL EVIDENCE, ETC. 291 slag, or of any other time proof and indestructible mate- rial. The ... within, a plate glass front is hermetically sealed into that opening and ...

... wire (or blowpipe and plaster or char- coal block). Glass rod. Materials: Aluminium sulphate. Filter paper. Cobalt chloride ( ... 50 g., fractional weights in divided compartments under glass cover, all in wooden block with hinged cover. V. Materials (Except Agriculture) Acid, ...

... spectroscope. Three prisms are made up into a glass block with paral- lel entry and exit faces. It ...

... sources; windows placed near ceilings, strips of directional glass blocks, clerestory windows, skylights and so on. There is ... is not faced by pupils, supplemented with directional glass blocks from the tops of the windows to the ...

... applied to the four corners of the glass block and a glass cover is firmly placed in position. Daily the ... drops of water which con- dense on the glass cover and on the block and are returned to the wadding. After a ...

... ft. 7 in. ; but we may employ the glass blocks employed underneath piano feet as an expedient. It ... that are to undergo staining are the solid glass blocks, now procur- able at very small cost at ...

... 208 200 251 252 INDEX. 303 Wooden filtering blocks Working glass PAGE 79, 204 . 50 Yttria, action of reagents ...