Pulp and paper magazine of Canada . illmake several improvements on the pres-ent machinery which they build and willadd some new lines of paper mill F. L. Winkley, for some years connect-ed with the mechanical department ofthe company, is now representing thatcompany^ on the road, visiting paper millsin connection with orders for machinery. L. Grey, who w^as formerly connected withthe mills at Sturgeon Falls, is said to be in-terested in a project to build a 75-ton sid-phite mill at Thorold, Ont. Magazine of Canada 253 Testing Permeability of Paper to Air Professor W. Herzberg,
Pulp and paper magazine of Canada . illmake several improvements on the pres-ent machinery which they build and willadd some new lines of paper mill F. L. Winkley, for some years connect-ed with the mechanical department ofthe company, is now representing thatcompany^ on the road, visiting paper millsin connection with orders for machinery. L. Grey, who w^as formerly connected withthe mills at Sturgeon Falls, is said to be in-terested in a project to build a 75-ton sid-phite mill at Thorold, Ont. Magazine of Canada 253 Testing Permeability of Paper to Air Professor W. Herzberg, at the recentmeeting of the Association of Cellulose andPaper Chemists described in an interestingmanner some hand apparatus for determin-ing the permeability of paper to air, whichmerits special attention. This is of con-siderable importance in some kinds of paper,notably those employed for wrapping cer-tain articles of food, condiments, etc., suchas cocoa, tea and spices, and as a means ofdetermining the extent to which paper can. be permeated by air. The process and ap-paratus illustrated herewith (Fig. 1) weredesigned by Sindall. In Fig. 1, A is a glass cylinder, the edgeof which, B, is turned over and groundleveled. On this a thin rubber ring andthe sample of paper to be tested are laid,the whole being securely held against therim by a brass ring and several metal thumbscrews. The lower end of the cylinder isclosed by a rubber plug, through a hole inwhich a glass tube passes, which, by meansof a rubber hose, is connected with thesiphon D. Iliis siphon conducts water from thebottle C into A; into the bottle C waterflows from any convenient source; it is pro-vided with an overflow, so that the water itcontains stands always at the same removing the pinchcock from the rubbertube, water enters the cylinder A and dis-places the air it contains. This displace-ment occurs the more gradually the less per-meable to air the paper, stretched over thecylinder, is. Sindall mea
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaperma, bookyear1903
