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 residences Astigmatism-Warner Prisms, residences, Mirrors- construction A Quantitative Optical try out for Telescope Mirrors-King acting the Ronchi attempt Quantitatively The Hartmann Test-Calder Flats-Selby Notes the of Optical resting find out how to Make Eyepiece Lenses The Refractor-Metal elements and Mounting-Taylor The Refracting Telescope-Principles of Operation and ConstructionHaviland almost always at the goal Lens objective Scopes-Kirkham For the Rifleman trying out Convex round Surfaces-King Collimation and Adjustment Diagonal circulation 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

Iiutating tlic niirror in the same direction as t h a t in whicli tlie strokes progress miglit result in tlie sarne side of the mirror getting most of tlie polisliirig for a long successiori of strokes, making the surface lop-sided and no longer a figure of revolution. \Vilile getting accustomed to tlie "feel" of this stroke, t r y placing a sxnall piece of paper, wet t o make it stick, near the edge of the niirror, and see lionr slowly but uniformiy it can be made to go around. Nerer allow tlic rnirror t o be turning a t the end of a stroke.

L r t it be rtiostly thinking. Both a r e good for mirrors. With pleiity of testing ancl tliinkinp, and ~)reveiiting backtrackinp by tnking tlie proper corrective measiires the nioriient tlicir necessity arises, the actual labor involved will becorne almost insignificant. TVell, as we rend o r e r what we liarc writtcn, we cannot help but chiickle. " S o which the answer is N O ! For those wlio have bcen tliroiiph tlie experience once, and understand what is poing on during tlie rarioiis stages of tlie work, our recommendations would be as followi.

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