The boy's own book; a complete encylopedia of all the diversion, athletic, scientific and recreative, of boyhood and youth. (1834)
Clarke, William, 1800-1838, McManus-Young Collection (Library of Congress) · Boston, Munroe and Francis; New York, C. S. Francis, 1834. · leaf 119
ntly, or even parallel, as in the figure following. At the other end of the tube, (the object end,) where the two reflecting surfaces, a c 5 c, terminate, a circular piece of ground glass is to be fitte? “nto the tube, and retained there by means of a piece of wire, which is to be bent to a circle,… … placed between the two glasses and visible through the angular aperture, abc. ‘Twn round the cap, more or less, in which the objects are so placed, and you will perceive a change in the combinations of the images ; new forms will present themselves, entirely different from the former, sometimes…
Amusements · Sports
Library of Congress, Rare Book and Special Collections Division · No known copyright restrictions. Free to use for anything.
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-102-239.webp)
