Was andere dazu sagen - Rezension schreiben
Es wurden keine Rezensionen gefunden.
Andere Ausgaben - Alle anzeigen
accurate adjustment allow amount angle axis bottom brass Brightly called carried cause centre chord Civil Engineers clamp close Compass construction course cross curve defects distance divided drawing edition Engineers entire equal error express extra feet field foot four furnished give given glass graduations hairs half head horizontal improved inches long increase Institute instrument lamp legs length letter light limb load magnetic magnifying manner marks means measuring Messrs method Michigan Mining minutes move necessary needle never object oblique ordinary Philadelphia plate plummet practice precisely present Railroad removed ring screw seen short side sights slide steel strains Survey surveyor Table taken tangent tape telescope Transit tripod Tunnel turned United University variation vernier vertical weight wire
Seite 11 - The undersigned, having examined the product herein described, respectfully recommend the same to the United States Centennial Commission for award, for the following reasons, namely: 1.
Seite 42 - The numbers of the ten feet spaces were to be marked by drilling small holes in the tags. I intended to use this for the principal lines of my surveys and to use the chain only for lines which were not of great importance. " When I called upon Mr. Heller (of Heller & Brightly, the instrument makers, of Philadelphia) to order this measure, he suggested that it would be better to use instead of a wire rope, which would stretch, the bands which are manufactured for hoop skirts ; they are made of tempered...
Seite 37 - It has long compound centres ; the horizontal limb is read by two double opposite verniers, placed outside the compass box; the vernier openings in the plate being made very wide, so as to allow the easy reading of the graduations. There is a three inch magnetic needle, and its ring is divided to half degrees.