12 Me. J. Pateeson o« Obtaining Water of 



Hebrews and the ancients generally. By a similar mode of inquiry, he 

 showed their acquaintance also with copper, tin, bronze, lead, and iron. 

 (Mr. Xapier's paper was subsequently expanded, and published in the 

 form of a treatise on " The Ancient Workers and Artificers in Metal, 

 from references in the Old Testament and other Ancient Writings.") 



Mr. James Paterson described a method of obtaining cool water for 

 the city in summer from Loch Katrine. 



Abstract of a Paper read by Mr. James Patebson, pointing out means 

 whereby the Water from Loch Katrine might he obtained at a temperature 

 differing little from that of spring water, at all seasons of the year. 



Os examining the plans publicly exhibited for introducing the water 

 from Loch Katrine into this city, I observed, with regret, that there 

 appeared to be no provision made to obtain, and to prevent, the water 

 flowing into the city during the summer months, from reaching us at a 

 summer temperature, when at such a season cool water is so refreshing 

 and desirable. 



Being aware that it is a well established fact, that as we descend 

 from the surface towards the bottom of a lake, the diffei'ence in the tem- 

 perature of water between the summer and winter gradually decreases 

 until you reach the depth (in our Scotch lakes, accordmg to Jardine) , 

 of 120 feet, when the temperature continues constant dm'ing all seasons, 

 the idea struck me that it would be a great hoon to the citizens of 

 Glasgow, should effectual means be devised, whereby the water from 

 Loch Katrine could at all times be obtained of a regular temperature. 



In turning this matter over in my mind, I feel satisfied, that were a 

 malleable iron tube of sufficient area constructed, to fit the mouth of 

 the tunnel, and made watertight by means of vulcanized India rubber 

 rings, or otherwise, and of sufficient length to reach down to the 

 required depth in the loch, water of the desired uniform temperature 

 would always be secured, as the water would be withdrawn from the 

 loch at the depth to which the tube reached. And as the water in this 

 loch is said to be always of a comparatively low temperature (even in 

 the heat of summer), the water might be withdrawn with the desired 

 effect, at a much less depth than I have indicated above. Besides, by 

 the use of such a tube, we would not only avoid the surface water with 

 all its impurities, but would also provide against the regular purity of 

 the water being disturbed, by the surface soil drawn into the lake on 

 the occasion of any flood or thunder-storm. 



Water thus obtained, if allowed to flow into the reservoir, as indicated 

 in the plans, would so be neutralized. An alteration here would also 



