and engineering journal . E. HERE IS THEDAVIS - BIRAMANEMOMETER. It is constructed on the principleof the revolving fan, and offersseveral advantages over its pre-decessors. The air enters, asusual, from the back of the in-strument, and instead of passingin a straight line through theprotecting ring, is deflected out-wards by a cone through port-holes. The friction of the airpassing through the instrumentto the outer air is practically constructed, it is possible tobring the instrument in front ofthe operator, and experimentshave proved that, if held l« the body, there i
and engineering journal . E. HERE IS THEDAVIS - BIRAMANEMOMETER. It is constructed on the principleof the revolving fan, and offersseveral advantages over its pre-decessors. The air enters, asusual, from the back of the in-strument, and instead of passingin a straight line through theprotecting ring, is deflected out-wards by a cone through port-holes. The friction of the airpassing through the instrumentto the outer air is practically constructed, it is possible tobring the instrument in front ofthe operator, and experimentshave proved that, if held l« the body, there is no hind-rance to the free current of air,and that the accuracy of thereadings is not interfered , what was previously eonsidered impossible lias beenachieved. The Davis Hiram Ane-mometer has several other distincl advaritkges winch places itahead of all others. May wesend you full particulars?Sole Agents tor South Africa: BARTLE&CO.,LTD. Loveday House. Box 1166. Phone 3553. at and CONDENSITE CELORON. A Remarkable Waterproof Insulation Material. CONDENSITE CELORON, made from a fabric base or a base ofDiamond-Fibre (genuine vulcan-ized fibre), thoroughly impreg-nated with water-resistingCondensite, possesses the highdielectric properties of the well-known Condensite products,together with the physical proper-ties of Diamond-Fibre. CONDENSITE CELORON for in-sulation and insulating parts isespecially valuable for serviceunder damp or moist will not warp, shrink or swellthrough exposure or age. Itcan be readily machined and istherefore adaptable for manypurposes. It is insoluble in allordinary organic solvents.
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectmineralindustries
