NOTE ON THE PUBLICATIONS OF THE SOCIETY. 
The ten volumes of the bulletin now issued cover the proceedings 
of the Society from its organization in March, 1871, to the end of 
December, 1887, a period of 17 years. Volumes 1 to 3 of the Bulletin 
apply to irregular periods; volume 4 gives the proceedings for a 
Society’s year, beginning in October of one calendar year and end- 
ing in June of the next. In 1882, the Society’s year was changed 
to coincidence with the calendar year, and volume 5 contains the 
minutes from October, 1881, to December, 1882, inclusive. Volumes 
6 to 10 cover, respectively, the calendar years 1883-1887. 
The pages of all the volumes have been stereotyped at the expense 
of the Smithsonian Institution, and after the Society’s edition, usually 
of 500 copies, has been printed, the plates have gone into the cus- 
tody of the Institution, which has subsequently issued an edition of 
its own, constituting a paper of its Miscellaneous Collections. In 
the Smithsonian edition, volumes 1, 2, and 3 of the Bulletin consti- 
tute volume 20 of the Miscellaneous Collections, and volumes 4 and 
5 constitute part of volume 25 of the Miscellaneous Collections, 
Volumes 6 to 8 have been reprinted by the Institution, but not yet 
gathered into a Collections volume for binding. Their numbers in 
the Smithsonian list are as follows: 
ae. 8 et ee ROP A O48 
Ie ge ne. eee ee Oe 
Oh Go a 6 sw es as cae NO Gao 
The Smithsonian edition is in the main typographically identical 
with the Society’s edition, but the following differences are to be 
noted. 
Volume 20 of the Smithsoniau Collections contains, in addition, 
the following title page and contents: 
Smithsonian Miscellaneous Collections. Vol. XX. (Vignette and 
motto.) Washington: Published by the Smithsonian Institution. 
1881. 
Contents. Article I. Bulletin of the Philosophical Society of 
Washington. Vol. I, March, 1871, to June, 1874. Pp. 218. 
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