6| 1.0715| 1.0723| 1.0731
192 | 1.0644| 1.0656| 1.0667| 1.0676| 1.0685| 1.0694| 1.0703| 1.0710
194 | 1.0623| 1.0636| 1.0646| 1.0655| 1.0664| 1.0674| 1.0682| 1.0689
196 | 1.0603| 1.0615| 1.0625| 1.0635| 1.0644| 1.0653| 1.0661| 1.0669
198 | 1.0582| 1.0594| 1.0605| 1.0614| 1.0623| 1.0632| 1.0641| 1.0648
200 | 1.0561| 1.0574| 1.0584| 1.0593| 1.0602| 1.0612| 1.0620| 1.0627
202 | 1.0541| 1.0553| 1.0563| 1.0572| 1.0582| 1.0591| 1.0599| 1.0606
204 | 1.0520| 1.0532| 1.0542| 1.0552| 1.0561| 1.0570| 1.0579| 1.0586
206 | 1.0499| 1.0511| 1.0522| 1.0531| 1.0540| 1.0550| 1.0558| 1.0565
208 | 1.0478| 1.0491| 1.0501| 1.0510| 1.0520| 1.0529| 1.0537| 1.0544
210 | 1.0458| 1.0470| 1.0480| 1.0490| 1.0499| 1.0508| 1.0516| 1.0524
212 | 1.0437| 1.0449| 1.0460| 1.0469| 1.0478| 1.0487| 1.0496| 1.0503

PUBLICATIONS ON THE UTILIZATION OF COAL AND LIGNITE.

A limited supply of the following publications of the Bureau of
Mines has been printed and is available for free distribution until
the edition is exhausted. Requests for all publications can not be
granted, and to insure equitable distribution applicants are
requested to limit their selection to publications that may be of
especial interest to them. Requests for publications should be
addressed to the Director, Bureau of Mines.

The Bureau of Mines issues a list showing all its publications
available for free distribution, as well as those obtainable only
from the Superintendent of Documents, Government Printing Office,
on payment of the price of printing. Interested persons should
apply to the Director, Bureau of Mines, for a copy of the latest
list.

PUBLICATIONS AVAILABLE FOR FREE DISTRIBUTION.

BULLETIN 58. Fuel briquetting investigations, July, 1904, to July,
1912, by C. A. Wright. 1913. 277 pp., 21 pls., 3 figs.

BULLETIN 76. United States coals available for export trade, by
Van. H. Manning. 1914. 15 pp., 1 pl.

BULLETIN 85. Analyses of mine and car samples of coal collected in
the fiscal years 1911 to 1913, by A. C. Fieldner, H. I. Smith, A.
H. Fay, and Samuel Sanford. 1914. 444 pp., 2 figs.

BULLETIN 89. Economic methods of utilizing western lignites, by E.
J. Babcock. 1915. 74 pp., 5 pls., 5 figs.

BULLETIN 119. Analyses of coals purchased by the Government during
the fiscal years 1908-1915, by G. S. Pope. 1916. 118 pp.

BULLETIN 135. Combustion of coal and design of fu