SE A MEE Mee SM eee FT | ee ee eet 
5s z . a 
Address of Professor Husley. 383 
4th Experiment. 
Taken 95 volumes of coal gas —=20°83 candles, observed. 
5 = hydrogen . = -..- 
. 100 “ mixture <==20°52 >“ i 
If hydrogen istaken =0 “ =19°79 “ galculated. 
Apparent error, + ‘73 ts “s 
New Haven, Sept. 1870. 
XLI.— Address of Thomas Henry Hualey, at the meeting 
of ‘he british Association at Liverpool, on the 14th of Sept., 1870.* 
Ir has long been the custom ae the Rene installed President 
of the British Association for the Advancement of Science to 
casting his eyes around the horizon of the scientific world, to 
report to them what could be seen from his watch-tower; in 
what directions the multitudinous eae of the noble army 
of the improvers of natural knowledge were marching; what 
3 goa strongholds of the great enemy of us all, ignorance, 
had been recently captured ; and, also, with due impartiality, 
to mark where the advanced posts of ee pes been driven in, 
or a long-continued siege had made no 
propose to endeavor to follow this ancient = ee in a 
manner suited to the limitations of my kn e and of my 
capacity. I shall not presume to nk a pee survey 
of the world of scienee, nor even to give a sketch of what is do- 
ing in the one great province of biology, with some portions of 
which my ordinary occupations render me familiar. But I 
gress of a Rags os biological doctrine ; oe I shall try to ee. 
ic 
mould; that brut, 
tai 
* From “Nature,” of Sept. 15. 
& 
