488 Proceedings of the Royal Society 
Scotland in considerable detail, was Dr MacCulloch. During a 
series of years he employed himself in carrying on a geological 
survey of the Western Islands, and published the results from time 
to time in the Transactions of the G-eological Society of London. 
At length, in the summer of 1819, he collected these scattered 
notices, rearranged and enlarged them, and published them as his 
well-known work on the Western Islands. Accompanying the 
text was a volume of plates, including detailed maps of the islands, 
with sections explanatory of their geological structure. This is 
one of the most important contributions ever made to Scottish 
Geology. It laid down with some detail, and for the first time, 
the geological structure of the long chain of islands from the Isle of 
Man to the Butt of Lewis, along with a portion of the adjoining 
mainland. It was accomplished, too, at a time ere steamers had 
been established, and when travelling in that region entailed no 
little inconvenience, and even personal risk. 
In the early part of this century there existed at Edinburgh a 
flourishing School of mineralogy and geology, under the leader- 
ship of Professor Jameson. That able and enthusiastic teacher 
infused into his pupils much of the zeal with which he himself 
pursued his favourite path of science. Though he travelled far 
and near over Scotland, and gave frequent notices of his labours 
to the various learned societies with which he was connected, he 
published but a small part of the mass of information which he 
had accumulated. It was indeed to his class at the University 
that he made known his observations and deductions, and he lived 
to see the seed which he had there sown bear goodly fruit in the 
career of not a few eminent naturalists. One of his early pupils, 
to whom the cause of geology in this country stands largely in- 
debted, was Dr Ami Boue, a native of Hamburg, who had come 
to Edinburgh to study medicine, and who took his degree in the 
year 1817. During his residence in Scotland Boue greatly dis- 
tinguished himself by his zeal in the prosecution of geology. He 
made long and frequent journeys in almost every part of the 
country, comparing the rocks of one district with those of another, 
and gathering together from his own observations, as well as from 
the recorded researches of others, a large and valuable mass of 
information regarding the geology of Scotland, which he published 
