Amateur Telescope Making Advanced, Book Two (A Sequel to by Albert G. Ingalls

By Albert G. Ingalls

Backwoods Philosophy-Everest reflect Making Sub-diameter instruments steel Mirrors and apartments Astigmatism-Warner Prisms, apartments, Mirrors- creation A Quantitative Optical attempt for Telescope Mirrors-King acting the Ronchi try Quantitatively The Hartmann Test-Calder Flats-Selby Notes the of Optical resting find out how to Make Eyepiece Lenses The Refractor-Metal components and Mounting-Taylor The Refracting Telescope-Principles of Operation and ConstructionHaviland customarily at the target Lens goal Scopes-Kirkham For the Rifleman checking out Convex round Surfaces-King Collimation and Adjustment Diagonal move Telescope Drives-Lower for greater Telescopes Spring Drives for Telescopes The Springfield Mounting-Pattern Making-Porter With of Molding and Casting Molding and Casting Parts-Ferson Molding and Casting a Fork-Mason Springfield Mounting mideligw on Molding and Casting Machining the Springfield Mounting-Porter Motor Drives, Counterweighting, Pier-Springfield Mounting-Porter....

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Extra resources for Amateur Telescope Making Advanced, Book Two (A Sequel to Amateur Telescope Making, Book One)

Sample text

If founcl sliglitly out of positioii, loop a stoiit cord :irouri

Don't botlier t o bring spherical hut aim for tlita ~,;ir;itioloitl frorn tlie heginnirig of poliihing. Get on a 40-second Iap and, as soon ;IS it is possible t o test, locxte tlie crest ~vitlitlie kiiife-edge in the half-u-ay positioii. S t a r t witli a strolíe wliieli \vil1 hriiig tlie edee of tlie lap not cliiite t « tliis crest :inil gire 'er n spell. On wiping up, the marginal xoiie \vil1 he foiiii(l to lie polisliiiig feist, witli tlie centcr scarcely touclied. Fine. vil1 h;ive already put in its appcaraiice and will be :I giiide frorn now on.

Arrst tlie unsupl>«rtc-il inrea. 'ihe net effect is, t o a mirior clegree, tlie s;imc. :is with tlie ovcrli;ing stroke made p;~r;illel t o this edge of tlie tool, excvpt hlendt-d out more iiito tlie nd,i;tcent zories. If tlie edge of tlie tool htis hren proiriid down excessively, or ttie edge of tlie pitcli Inp has been puslie(1 cln\rn. tlie cause in citlier c:i

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