Journal of the Franklin InstitutePergamon Press, 1865 |
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Page 103
... fatty matter penetrates into the substance of the leather and replaces it . The dubbing process is then repeated on the other side of the leather , which is now ready to be softened and rendered flexible , which is effected by rubbing ...
... fatty matter penetrates into the substance of the leather and replaces it . The dubbing process is then repeated on the other side of the leather , which is now ready to be softened and rendered flexible , which is effected by rubbing ...
Page 105
... fatty matters , especially animal oils , such as sperm . The skins are prepared in the same man- ner as for tawed leathers , and then submitted to what is called the prizing operation , which consists in rubbing the hair side On ...
... fatty matters , especially animal oils , such as sperm . The skins are prepared in the same man- ner as for tawed leathers , and then submitted to what is called the prizing operation , which consists in rubbing the hair side On ...
Page 106
... fatty matters and rye flour , which having been prepared a few days previously has entered into fermentation , and which has so modified the fatty matters as to render them more susceptible of immediate absorption by the hide . I think ...
... fatty matters and rye flour , which having been prepared a few days previously has entered into fermentation , and which has so modified the fatty matters as to render them more susceptible of immediate absorption by the hide . I think ...
Page 107
... fatty matters called oleophosphoric and phosphoglyceric acids , which doubtless , by their peculiar composition , communicate to the skins those properties which characterize this class of leather . The skins are then washed and dyed in ...
... fatty matters called oleophosphoric and phosphoglyceric acids , which doubtless , by their peculiar composition , communicate to the skins those properties which characterize this class of leather . The skins are then washed and dyed in ...
Page 110
... 30 per cent . when inferior . But even then the wool still retains a cer- tain amount of fatty matters , which it yields to hot alcohol . The following table , published by M. Chevreul , will 110 Mechanics , Physics , and Chemistry .
... 30 per cent . when inferior . But even then the wool still retains a cer- tain amount of fatty matters , which it yields to hot alcohol . The following table , published by M. Chevreul , will 110 Mechanics , Physics , and Chemistry .
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66 date acid action air pump amount apparatus applied arrangement atmospheric Bessemer process boiler carbon caseine cast iron cause cent centre chemical coal color combustion condenser constructed containing cubic cubic foot cylinder diameter effect employed equal evaporated expansion experiments fact fatty matters feet fluid force FRANKLIN INSTITUTE fuel furnace gauge glass glycerine heat horse power increased kilometres per hour L.-THIRD SERIES.-No length less lime London magnesium manganese manufacture marine engines material means mechanical mercury Messrs metal miles Mont Cenis motion naphtha obtained ordinary paper pass patent petroleum pipe placed plate portion practical present pressure produced proportion quantity rails railway resistance screw ship side silicate soap soda spermaceti square inch strain strength stroke substance sulphur sulphuric acid surface surface condensers temperature thickness tion tons truss tube valve vessel weight wheels whilst wool wrought iron