Reviews—Man as an Instrument of Research. 329 
Scotland, the joint island is formed mainly of Torridonian grits and 
flags, with Lewisian gneiss in the north, and elsewhere small areas of 
limestone, eruptive rocks, and raised beach. A more detailed geological 
sketch-map was published by Mr. W. B. Wright in 1908," based on 
field-work carried out in the course of the geological survey by 
Mr. E. B. Bailey and himself. It would have been well if this map 
had been reproduced in the volume before us, especially as the author 
acknowledges help from Mr. Bailey, who has “‘ corrected and amplified 
the chapter on Geology’’. As it is, there are no illustrations of any 
kind in the volume, although the object of the author in his chapter 
of fourteen pages on the ‘Geological Formation ’’ is to note the 
relations of the rocks to the landscape and the flora. 
The limestone, described under the name of Colonsay lmestone, 
appears to form part of the Torridonian Series, resting on flags and 
being overlain by phyllites, and in places by the granitic rock of 
Sealasaig. The author describes the various types of rock and their 
economic uses, and notes that the so-called ‘‘Scalasaig granite” is 
a diorite. 
The occurrence of boulder-clay in hollows in various localities is 
mentioned, and the effects of glaciation are noted in the rounded 
outlines and smoothed and striated surfaces of the rock-formations. 
In comparing the rocks and flora the author observes that there is 
more in common between the floras of Colonsay and those of the 
schistose and gneissose islands of the Outer Hebrides than there is 
between the Colonsay plants and those of the basaltic islands of the 
Inner Hebrides. Nevertheless, the soils on Colonsay are naturally 
influenced by the erratic materials of the Boulder-clay and by the 
Raised Beach deposits. 
The work cannot fail to be a useful guide to the visitor who is 
interested in Natural History, as may be judged from the title which 
we give in full. 
VI.—Maw as an Insrrumenr or Reszarcu. Presidential Address 
of G. W. Lampruen, F.R.S., to the Hertfordshire Natural History 
Society, April 12, 1910. 
NE would hardly accuse Mr. Lamplugh of being a wag; yet the 
instrument that comes to one’s mind more often than any other 
when dealing with scientific men is connected with boring. For 
most scientific men are so wrapped up in their little subject that 
the great world and its issues are lost sight of. We are grateful to 
Mr. Lamplugh for one sentence—‘‘ Everyone who has tried to translate 
his observations into accurate description must have felt the inadequacy 
of language.” It is a commonplace, but so true! He has, again, 
touched up those who, having large collections of material or fact, 
remain mute and neither use them nor allow others to use them to 
their full advantage. We disagree with him when he advises people 
to ‘‘record simple facts alone, without attempting to demonstrate 
their intricate relationships or to trouble himself with the technicalities 
by which these relationships are conventionally expressed”. There 
1 Quart. Journ. Geol. Soc., lxiy, p. 298. 
