. Transactions. ering prevented the escape of air, and ingress of water, dur-ing the process of weighing, while the specimen was suspendedin the vessel of distilled water and the true specific gravity wasthus readily approximated. Notwithstanding the truly astonishing increase in cubic di-mensions of these cast-iron bars, none of them have as yet fin-ished growing, nor do they show any signs of am unable, therefore, to define the limits of growth. Theexperiments are still in progress. (See footnote on page 231.) The fact that there is a loss of tensile and transverse strengtho
. Transactions. ering prevented the escape of air, and ingress of water, dur-ing the process of weighing, while the specimen was suspendedin the vessel of distilled water and the true specific gravity wasthus readily approximated. Notwithstanding the truly astonishing increase in cubic di-mensions of these cast-iron bars, none of them have as yet fin-ished growing, nor do they show any signs of am unable, therefore, to define the limits of growth. Theexperiments are still in progress. (See footnote on page 231.) The fact that there is a loss of tensile and transverse strengthof from 25 to 30 per cent, in some of the tests might seem, atfirst sight, to put a barrier in the way of a practical applicationof these new observations; but such is not the case. Alreadyseveral such applications have been suggested and tried withsuccess. For example, very recently a cast-iron pattern of a pin-cam lever was made in two halves for a new machine, I II I MOBIL] n I MOL1 CULES l CAST-II 2 1 Fio. ^j Bar No. 1. Total expansion, 27 heatings, is l}i in. in length and } in. in eachtransverse dimension. Bar No. 2. Untreated companion of bar No. 1. Bar No. 3. Total expansion, 27 heatings, is 15 in. in length and | in. in each transverse di-mension. Bar No. 4. Untreated companion of bar No. 3. Bar No. 5. Total ex-pansion, 50 heatings. 1. in. in length and in. in each transverse N Total expansion, 30 heatings. | in. in length and -/ in. in each trans- se dimension. Bar No. 7. t-iron piston having the polished end expanded heat-treatment. Bars Nob. 1, 3, 5, 6 and 7 have been chalked
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
