188 PKOCEEDINGS OF THE 



a good tleal of brass wire gauze. I imagine that small spots of 

 oxide may be produced on this which may adhere to the paper, 

 but how it should take on the dendritic form is not so easy to see. 

 I found a quantity of printing paper with such spots, and it was 

 only by cutting out a great many of them that I got enough 

 to test. Copper has been found in paper by Berzilius, but, as I 

 understand, it was unifonnly distributed through it. It is men- 

 tioned iu books as a proof of his skill with the blow-pipe that he 

 could detect mth it copper iu the ash of a single sheet of paper." 



PAPER READ. 



On the Land and FresJi-Water Mollusca found within Ten Miles 

 around Glasgow. By Mr John Dougall. 



I have divided the suljject into four parts, the 1st being a 

 synopsis of what I have accomplished in the way of collecting; 

 the remaining three are more practical in their bearing, and em- 

 body the details of my experience as a collector^ They are — 2d, 

 When to collect ; 3d, "VMiere to collect ; 4th, How to collect. The 

 2d implies that there are certain seasons to collect in; the 3d, 

 that there are certain localities to collect in; and the 4th, that 

 there are certain ways of collecting, in order that it may be done 

 economically and successfully. 



With reference, then, to the 1st, I find from memoranda, that I 

 made altogether fifty-four excursions, beginning early in March, 

 and ending about the middle of July, visiting, in the interval, 

 besides several localities in the suburbs, Cadzow Castle and forest, 

 Bai'ucluith Gardens, Blantyre, Blantyre Priory, Bothwell Castle, 

 Calderwood Glen, East Kilbride, Cathkin, Carmunnock, Busby, 

 Gorbals Gravitation Reservoirs, Barrhead, Crookston Castle, Glen- 

 iifer Braes, Canal at Paisley, Auclu>ntorlie Glen and Bell's monu- 

 ment. Bowling, Old Kilpatrick, Dalmuir, Spout of Ballagan, St 

 Germain's Loch, Possil Marsh, Kelvin, Bardowie Loch, Monkland 

 Canal from Blackhill Locks to Baillieston, Forth and Clyde Canal 

 at intervals from Bowling to Hungryside Bridge, Craigenglen, 

 Campsie Glen, Skilengow old limestone quarries North Hill 

 Campsie, Hogganfield, Frankfield, with Bishop and Johnstone 

 Lochs, Gartcosh. Most of these localities have been visited more 

 than once, many of them several times, yielding in all twenty-one 

 genera and forty-seven distinct species,* besides numerous varieties 

 * The collection has been placed in the Hunterian Museum. 



