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associated with the Hydrology of the localities. Although the 
enquiries and observations made will perhaps be thought by 
some over minute, yet knowledge and experience resulting from 
them cannot be held to be of less value on that account. An 
apple talling to the ground suggested, it is said, to the mind of 
Newton the operation of the laws which regulate the universe. 
A very poor telescope of Mrrtus or the spectacle maker Jansen 
suggested to GatitEo the more powerful instrument through 
which he viewed innumerable and immeasurable masses moving 
in boundless space. A few weights and pulleys, working a 
model wheel in a little vessel of water in Joutn’s study, 
established his famous law. So small things lead to great. 
What is learnt in a district of this small insular land may 
possibly be expanded and applied to larger areas, such as that 
of the basin of the Volga, containing upwards of half a million 
of square miles, or to the Danube, (as regards volume of dis-— 
charge) the largest river in Europe, indeed to the study of 
Hydrology on a larger scale, and in Continental lands. 
