= 
Prof. Gautier on recent Researches relating to Nebula. 105 
have too feeble a light to be visible when the micrometer wires 
are strongly illuminated. He has first placed in one chart 262 
Stars and has divided the surface of the same into four sheets, so 
Constructed as to be united into one. The form and arrange- 
ment of the elongated luminous clusters, alternating with spaces 
More or less obscure, emanating from the vicinity of the trape- 
zum, have been determined by two independent processes, the 
nebula having been first sketched as a bright object upon a dark 
Sound, and afterwards as a dark object upon a white ground. 
I cannot here enter into the descriptive details given in the 
analysis of the memoir of Mr. Bond. I therefore confine myself 
Stating his conclusion that the general appearance of the 
ater part of the nebula of Orion is an assemblage of tufts or 
curvilinear pencils of luminous matter, emanating from brilliant 
of his great reflecting telescope. The nebula No. 51 of Mes- 
Sler's catalogue was the first 24 which this msi arrangement, 
wont bad escaped the attention of the two Herschels, was dis- 
vered, 
Ax. Jour. Sct,—Szconp Sznrms, Vou. XXXV, No. 103.—Jan., 1868. 
4 
