184 NATIONAL ACADEMY OF SCIENCES 
experiments with Dr. Hare with the oxyhydrogen blowpipe, 
which Hare had just then invented. In 1805 he visited Europe, 
spending much time in England and Scotland where he met 
or studied under Professors Hope, Murray, Playfair and other 
eminent men of science, at the same time recording his impres- 
sions of men and things which he published later under the 
title of a “ Journal of Travels in England, Holland, and Scot- 
land in 1805-06.” 
Upon his return to America, Professor Silliman resumed 
his lectures at Yale, and continued in the duties of his professor- 
ship for half a century. In 1811 he conducted an extensive series 
of experiments in melting refractory minerals with Hare’s blow- 
pipe, of which he published an account the following year. At 
the same time, while working with Hare’s “ galvanic defla- 
grator,” he observed that the charcoal of the positive pole was 
transferred to the negative pole and that it was fused. “It is 
claimed for Professor Silliman that he was the first to establish 
this transfer of the particles of carbon, and the first also to fuse 
carbon in the voltaic arch.” (Caswell.) 
In 1819 he established the highly important scientific period- 
ical, the dmerican Journal of Science, with which his name is 
most widely associated, and of which he was the sole editor for 
twenty years, and the senior editor for eight years in addition. 
In 1820 he published an account of a journey from Hartford 
to Quebec, in 1829 an edition of Bakewell’s Geology, with an 
appendix containing a summary of his own lectures on that sub- 
ject, and in 1830 the whole body of his lectures on chemistry at 
Yale, under the title of “‘ Elements of Chemistry, in the order 
of the lectures given in Yale College.” 
From 1834 to 1845 Professor Silliman delivered courses of 
lectures on scientific subjects in the principal cities of the United 
States from Boston to New Orleans. He visited Europe again 
in 1851, and in 1853 published an account of his observations in 
three duodecimo volumes. 
Regarding Professor Silliman’s labors, Caswell remarks “ His 
special field was the diffusion of science; and his special gifts 
