170 On the Ancient Lake Habitations of Switzerland. 



to objections on the ground of the smallness of the circles, that 

 any increase in the diameter of these circles destroys to that 

 extent the compactness and portability of the "clip"; in fact, 

 the great end in view, that of making the portable little piece 

 of mechanism which goes by that name, answer many really 

 useful purposes, besides those originally contemplated in its 

 construction — at the same time without interfering with its 

 own original capabilities — would not be attained if the diameter 

 of the circles were materially increased. 



I will finish my description by noticing another advantage 

 of the instrument— -that of an unattached day-finder for a larger 

 instrument. When once the object, such as Venus or Jupiter, 

 is in the field of the small equatoreal, a large instrument may 

 be directed to such object with great ease. My plan is as 

 follows : — Make the outside edges of the two telescopes 

 sensibly parallel, by eye, and, by means of an instrument con- 

 sisting of a level and graduated arc, make the inclination of 

 both to the horizon the same. After a few seconds employed 

 in doing this, the object will be found in the larger instrument. 

 Some years ago I found this plan most convenient in directing 

 a large reflector, 12 inches diameter, to Venus, Jupiter, and 

 Saturn, when it would have been hopeless to attempt to find 

 them by ordinary means.* 



ON THE ANCIENT LAKE HABITATIONS OF 

 SWITZERLAND. 



J3Y HENRY WOODWARD, F.Z.S. 

 (With a Tinted Plate.) 



The evidence of the high antiquity of man has long occupied 

 the earnest attention of scientific men, and has of late attracted 

 the notice of educated people generally. 



The reason for this will be found in the number and im- 

 portance of the discoveries made of late years in localities as 

 widely separated as Ireland and Switzerland, France and Den- 

 murk, England and Belgium. 



These diseov erics in elude : — 



I. Oval and spear-shaped flint implements of a rude but 

 nniform type, occurring in "drift-gravels" in the valleys of the 

 Seine and Soiinnc, in France ; the Ouse and the Wavency, in 

 England, ete., etc., associated with the remains of extinct 

 species of elephants and oilier pachyderms, etc. 



II. Human remains and implements, with horns, bones, and 



* Home otid _Thornthwaitc's " Star Finder" is an elegant instrument for this 

 pin pose. —Ed. 



