363 Description of an improved Pumpjor raising 



A Quartz Crystal weighing 30 lbs. was found in loose 

 earth, probably alluvial, on Knocklaid Mountain S of Bally- 

 castle, Mr. B. p. 1 7S and 209, and another weighing 2 lbs. 

 2oz.,with numerous smaller ones, on the alluvial shores of 

 Lough Neagh, with ^locoa stones, Cornelians, at the SE 

 corner of the Loujih in particular, Mr. B. p. 78, 105, and 

 173 ; Topazes and Ametln/sts, p. 173, and some of the last 

 species of stone at 15 ?«. distant from the Lough, Mr. B. 

 p. 172. 



'* Limestone Gravel exists in manv parts, at Ballinderry 

 near the Corn Mill in the River Dumart, also at Portmore 

 Park in the parish of Glenavy," Mr. D. p. 68. 



I cannot dismiss the valuable statistical Survey of An- 

 trim, without lamenting, that Mr. Dubourdieu has not ad- 

 ded a copious alphaheticdl Index to it, which would greatly 

 have increa!<ed its usefulness, as the depositorv of so many 

 facts interesting to the Naturalist and CEconomist. 



Dr. Drummond announces, (preface p. xxvii) that his 

 friend Dr. Mac Donmi has in hand a work, giving a de- 

 tailed and satisfactory account of the mincralo2;y of the 

 County of Antrim : to this gentleman, I may hope, that 

 some things herein may not prove devoid of interest and 

 use. 



I am, sir. 



Your obliged and very humble servant, 



12, Upper Crown Street, Westminster, JoHN FaREY Sen. 



March -25, 18:2. 



Lir. Description of an improved Pump for raising the 

 Water ivliiie Skajis or Pits are sinki?ig. By Mr. 

 William B r u nto n, 0/" Butterley Iron Works, Derby • 

 shire*. 



Sir, -I BEG leave, through you, to lay before the Society 

 for the Encouragement of Arts, Manufactures and Com- 

 merce, drawings of a pump upon an improved construction, 

 for the purpose of raising water from [)it3, whilst they are 

 sinking. Before 1 enter upon an explanation of my plan, it 

 will be requisite to state those inconveniences arising from 

 the common mode, which are intended to be obviated. 



First, as it is necessary for the pumps whilst sinking, to 

 be always working upon air, that the water may be kept 



• Icrora Transactii'ns of Che Siicidii for the Encourngement nf Arts, Martu- 



faUures, and CommeTce, tor 18 il. The silver medal of the Society was 



voted to Mr. Bruntoa for this communication. 



very 



