Some Accott7U of the lato M, Guinand. 255 



ficulty might deprive him not only of the prize, but of th« profit 

 ivhich he might fairly derive from his sacrifices, by the exercise 

 of an industry in which he had no competitor. 



Though his success was not publicly known, yet he had ac- 

 quired, by means of his different labours, and^ especially by hi« 

 manufacture of achromatic telescopes, a sufficient degree of re- 

 putation to be visited by men of science who travelled into hi$ 

 country ; having thus became acquainted with Captain Grouner, 

 of Berne, an intendant of the mines, the latter had occasion in 

 Bavaria to speak of the labours of M. Guinand, and a short time 

 afterwards, in 1804, he asked him, on the part of M. Frauen- 

 hofdr, the chief of the celebrated establishment of Benedictbeurn, 

 for some specimens of his glass. The letter of M. Grouner at 

 once testifies the high esteem he had conceived for M. Guinand, 

 and his earnest wish that his discovery might be rendered useful. 

 M. Frauenhofer after examining these specimens, and requesting 

 several disks of the glass, was so well satisfied with them as to 

 repair in person to Brenets, a distance of about ^60 miles, where 

 he engaged M. Guinand to take a journey into Bavaria : having 

 arrived in 1 805, he determined to settle there ; and during a 

 residence of nine years he was almost solely occupied in the ma- 

 nufacture of glass. It is from this period that M. Frauenhofer's 

 achromatic telescopes have acquired so well-merited a reputation. 



Returned to his native country, he again established himself at 

 Brenets, where he is often visited by foreigners, attracted by the 

 beauty of the situation, and the view of the waterfall of the Doubs. 

 After having discontinued for several years subsequent to his 

 return all his labours relative to optics, his taste for the pursuit 

 revived, and from that time his entire occupation was alternately 

 the manufacture of glass and the construction of telescopes, in 

 proportion as either object appeared likely to prove most profit- 

 able.* 



* Being at a very advanced age, M. Guinand wished to return to the land 

 of his birth, and a pension was granted to him by the establishment of Bene- 

 dictbeurn , on condition that he should no longer employ himself in making glaai^ 

 nor disclose his process to any person whatever. After his return he resided at 



