‘VII. 
LIST OF PAPERS PRESENTED TO THE 
ACADE? 
? 
TO JANUARY 1, 1866. 
1. On the Individuality among Animals, with reference 
to the Questions of Varieties and Species, by Louis 
gassiz. 
2. On the Elements of the Mathematical Theory of Quan- 
tity, by Benjamin Peirce. 
3. On the Discussion of Magnetic Observations made at’ 
Girard College Observatory, in the Years 1840-1845, 
Parts IV., V., and VI.; Horizontal Force ; Investiga- 
' tion of the Eleven-year Period of the Solar Diurnal 
Variation and Annual Inequality, and of the Influence 
of the Moon, by A. D. Bache. 
4. On the Force of Fired Gunpowder, and the Pressure 
to which Heavy Guns are actually subjected in firing, 
by F. A. P. Barn 
5. Reduction of the Observations of the Fixed Stars 
made by J. J. Lepaute d’Agelet at Paris, during the 
Years 1783-1785, with a Catalogue of the corre- 
sponding Mean Places referred to the Equinox of 
1800, by B. A. Gould. 
6. On the Metamorphoses of Fishes, iy: Louis Agassiz. 
?. On the Saturnian System, by Benjamin Peirce. 
8. Notes on the Parallelogram of Forces and on Virtual 
Velocities, by Theodore Strong. 
