74 Miscellaneous Intelligence. 



"before the Royal Society in the following year. He also investi- 

 gated the chemical constitution of the opium baseS and their pro- 

 ducts of decomposition, and made elaborate deteraiinations of the 

 expansion by heat of mercury and water. For his various re- 

 searches the Royal Society, of which he was early chosen a felloe, 

 awarded him in 1869, its gold medal. 



In the fifteen years which comprise his scientific life Dr. Mat- 

 thiessen published at least tAventy-eight memoirs. That he was 

 able to accomplish so much was owing in great part to a judicious 

 economy of time, not the penuriousness "which refuses 'hours of 

 relaxation to days of labor, but to a right choice, of subjects 

 which would repay investigation, and of the most direct means 

 by whicli the investigation could be carried out. He had also the 

 facultv of availing himself of the poM^ers of others by associating 

 them with his work. 



Vs"\\\\ remarkable aeuteness of mind, or shrewdness, Dr. Mat- 

 thiessen had a sincere and afiectionate disposition. Resolved 

 from the first to make his own way, he was always ready to help 

 on others. He was a kind, a firm, a generous friend ; generous of 

 his thoughts, his means, and his influence. At the time of his 

 death, no man of his age in England stood in a higher position in 

 science ; nor was there one from whose future, jtidging from his 

 past, more might with reason have been expected. " d- 



3Ir. Edward Hartley, Mining Engineer of the Geological Sur- 

 vey of Canada, died in Pictoii, Nova Scotia, on the loith of No- 

 vember last, aged twenty-three years. Mr. Hartley was the 

 eldest son of Mr. William M. 11 Ilartlcv of Xew York, and 

 grandson of Mr. Philos Blake of New Haveii. He early showed a 

 special aptitude for the study of the natural aii<l physical sciences, 

 and for mechanics. At the age of fifteen he became a student in the 

 Sheffield Scientific School of Yale College. On leaving the school, 

 though still very young, he was at onc(»'charue(l with the examina- 



vania, and subsequently with the erection cf machinery for work- 

 ing gold in North Caroliini. His abilities attracted the attention 

 of the officers of the Geological Survey of Canada under Sir ^^■ 

 E. Logan, and in July, 18G^^■, he joined'the Survey as a oeologieal 

 assistant. The following year he was appointed )dining Engineer 

 to the Geological Survey. His duties from this time confined him 

 to the coal-fields of Nova Scotia, where in IsO.s he worked con- 

 jointly with SirW. E. Logan, and in 1860, ahme, completing a 

 careful and detailed Survey of the Pictou coal-basin, of whid' an 

 elaborate report by Sir William and another by himself ^^^^ 

 printed and privately distributed before his deatli. It ^viU "^ 

 published with a map in the forthcoming volume of the Goologi- 



During 1870, Mr. Hartley was engaged with an a.^sistant in the 

 Survey of the Cumberland coal-basin In Nova Scot in, and of tie 

 Cape Breton collieries, and had nearlv completed Ins labors tbrthe 

 season when he died after an illness of hut six davs diinitioo, 

 brought on, probably, by labors beyond his physical strength. 



