Vol. 52.] ANNIVERSARY ADDRESS OP THE PRESIDENT. lxi 



considers that these include such colossal works as his ' Mineralogy ' 

 and his ' Manual ' and ' Text-book of Geology,' one is astonished at 

 Prof. Dana's wonderful power of work, nor is one surprised to 

 learn that his health broke down upon several occasions owing to 

 his excessive mental labours. It is extremely touching to read of 

 Prof. Dana working on at the new edition of his ' Manual of 

 Geology' at the age of 82, and being actively assisted in all his 

 literary labours by his life-long companion with never-failing and 

 watchful care to the end. 



It is impossible to do justice to this distinguished man and 

 personal friend in so short a notice, but we feel that, with our 

 American brethren, we have lost in him one of the greatest figures 

 in geology of our time. Prof. Dana died on'April 14th, 1895, in his 

 82nd year. 



It is hardly credible that a man could have attained to so high 

 a position at once in zoology, in mineralogy, and in geology, and, 

 from the specialization now rendered necessary by the progress 

 of natural knowledge, we cannot expect to look upon his like 

 again, nor to see united in one man attainments so varied in 

 character as were those of the American veteran, James Dwight 

 Dana. 



As a man, he was noted for the gentleness and kindness of his 

 character, so that he was always on excellent terms with all his 

 colleagues. He leaves a widow and four sons and daughters. 



Mr. Joseph Mitchell, Jun., Assoc.M.Inst.C.E., was born on 

 September 7th, 1840. He was distinguished as a colliery engi- 

 neer in the South Yorkshire district, several of the largest mines 

 in the Barnsley district having been either sunk or re-opened by 

 him. Among the latter may be noticed the Swaithe Main and 

 Edmund's Main Collieries, re-opened and put in order after ex- 

 plosions, and of the former the Mitchell Main Colliery. A more 

 important enterprise for the development of 2500 acres of the 

 Barnsley bed at Grimesthorpe was commenced about six months 

 before his death. Both as Secretary and President he contributed 

 largely to the development of the Midland Institute of Mining, 

 Civil, and Mechanical Engineers, and he was also very active 

 in the formation of that most useful body, the Eederated Insti- 

 tution of Mining Engineers. He was elected a Fellow of the 

 Geological Society in 1878. His death occurred on April 18th, 

 1895. 



