The American journal of science (1905) (17965852999)

Title: The American journal of science

Identifier: americanjourna4191905newh (find matches)

Year: 1880 (1880s)

Authors:

Subjects: Science

Publisher: New Haven : J. D. & E. S. Dana

Contributing Library: Smithsonian Libraries

Digitizing Sponsor: Biodiversity Heritage Library

Text Appearing Before Image:

S. L. Penfield—Crystal Drawing. rs oiisly determined, and parallel to the direc- tion from A to the point cot. 45° 50' on the vertical axis. In the case of ^, fignre 55, beiDg on the meri- dian 58° 25' from —^, a little explana- tion is necessary: A crystal face corre- sponding to ^, when shifted so as to inter- sect -f^, will inter- sect the negative ends of the A and C axes ; the former at the point marked y, cot. 58° 25', which is pro- jected down on the A axis beneath. The great circle throngh ^B and ^ makes an angle of 56° 10' with the equator, and the point cot. 56° 10' is laid off in this case on the negative end of the C axis. The linear projection of q is then the line inm^ drawn throngh y and parallel to the direc- tion from —A to the point cot. 56° 10' on the vertical axis. The lines nn and mm intersect at some dis- tance from the cen- ter of the axes, bnt if continued it is found that a line from +^ to their point of intersection is parallel to the direction Ci. If it is desired to make the linear projection 56

Text Appearing After Image:

'

американский научный журнал 1905 г. книжные иллюстрации естественная история Биологические науки наука изображения из интернет-архива

1905

Smithsonian Libraries

http://commons.wikimedia.org/

public domain