The Newtown bee., 1877-11-22
Eeliotypes--How They are Mads,&o.

Eeliotypes--How They are Made,&o.
 The following article is partial de, seriplion of this new art. from the N. |. Tribune. We are sorry that our space will not admit of giving the article eR- tire:
 Messrs James K. Osgood X Co. who own the Heliotype Process, have already familiarized the public with :he words, and have conveyed to all minds their genera import, namely, that the Hello, type in it's broad sense is mode of re. production which serves to popularize the best works of art by means of copies that represent the originals with fault less precision. But how is it doney What is the process We will endeaver to explain as clearly as possible the prin. ciple and the successive steps.
 The HeliOtype process was invented in London in 1870 by Ernest Edwards. who considered the word "Heliotyps" to express the result of his invention. IL is derived from the two Greek words. lieliOs, the sun, and turos, type, and thus signifies literally Sun Type" But broadly it means much more than that, as we shall s0oa see The process was introduced into the United States in 1872 by Osgood 6 Co.,, and Nr Ed, wards the inventor of it, has been from that date its superintendent under theix auspices.
 The lleliotype Process is the apphca, tion of tue welLknown principles of photography to the art of printing, and the practice of the printing press Pho. togrnphy is purely chemical lsr aclinica process, as it's name Gwriiing by lights implies. Printing, on the other hand is purely mechanical. The Felialype Pro cess is both chemical and mechanical. combining the chemical principles ot photography with mechanical methods of printing. In short, the Heliotyps Process may be comprehensiveIy describ, ed as photography in the printing prsss
 WHAT Is A HELInTypEY
 The product of the Heliotype Process is called iIeliotype. l. is both pho- tograph and print; 1t is photograph mechanically produced. and it is at tbs same line print having chemical orl. gin. The ordinary photograph is pro- duccd in evanescent materials, and will fade; the Heliotype, is printed with per- manent ink, and can never fade. The Heliotype, therefore, may be defined as , photomechanical print, possessing the exact features of a photograph together with the permanent qualities of ordinary printing. -........
 The process hug been extensively used in scientific works of the highest ciass, the United States Government having employed it largely Tn illustrating the Medical and Surgical History of the War, the reports of Lieutenant, Wheeles's and Professor Hayden's explorations, and many other important works. IL has proved valuable fos seyer,a State Governments, in illustrating their geo. logical surveys, and historical societies, in various states, have frequently em. ployed it ill reproducing objects from their collections. illustrations for town histories are also produced readily and Cheaply by it's means. In short, it may be said to be capable of d,aling with aL most everything that is found in nsturc, or that the ingenuity of man has devised. IL sGoud be borne in mind that the He liutype Process is not arlginatiye, but merely initiative. Itonly copies, but it does this with an absolpte fidelity; and this fact renders it specially valuable. In copying manuscripts, k omits or adds no word, or letter, or point exact ly what was written is reproduced. In multiplying old documents, it gives per- feet fac-similies, and is 8 certain guar. anlee ot their accuracy Aud, in what. ever i! does, it adds to the minute faith tulness of the photograph the perina- neLce which be ongs,to the noat,durable print ~
 HEIdoTYPE ESGRAyiNGs.
 But the msst important and most pop ular product of the process, and the one most engaging the attention of it's pro- prietors, is the reproduction and publi- catian of steel l.engravings.; and these re- productions are what the public com monly knows as helioiypes. Messrs lOs- good S Gp. have already published .ses
 lCortinuee on fourth psse.l