X BIOGRAPHICAL SKETCH OF 



tific men of the various departments in Washington greatly to 

 his pleasure and advantage. 



In 1883 he was employed by the Louisville and Nashville 

 Uaiiroad to make a full collections of the agricultural, forestry 

 and mineral resources occurring along the line of that road. 

 These collections, together with many additions subsequently 

 made, were placed on exhibition at the World's Exposition in 

 New Orleans in 1884, where Dr. Mohr also had charge of the 

 exhibit of the agricultural and other natural resources of the 

 JState of Alabama. This exhibit was also displayed at the 

 Louisville Exposition, and a descriptive catalogue of it was 

 published under the title "The Natural Resources of Ala- 

 'Uania," concerning which Prof. Lanison-Scribner, in a lecture 

 on {Southern Botanists, says, "this is one of the few papers of 

 its kind which possesses real scientific merit, and in no way 

 can mislead the reader or prospective settler." In the follow- 

 ing year (1884) he prepared a report on the soils, climate and 

 agricultural resources of the territory traversed by the L. & 

 N. railroad lines. 



The long continued work in the Exposition building in New 

 Orleans during exceptionally unfavorable weather conditions, 

 brought on a return of his rheumatic troubles, which greatly 

 interfered with his subsequent work in the field. 



In 1892 he turned over the management of his drug business 

 to his son and devoted his entire time to the preparation of the 

 "Plant Life of Alabama" and to the investigation of the Flora 

 of North America for the Division of Forestry of the U. S. De- 

 partment of Agriculture. 



In the prosecution of these works he spent much time in ar- 

 ranging the herbarium of Alabama plants at the University of 

 Alabama, mounting the specimens in the most beautiful style, 

 and classifying them according to the system of Engler and 

 Prantl. As a supplement to the collection of the native woods 

 of Alabama above mentioned, he also prepared a set of about 

 one hundred and fifty individual glass-front cases in which 

 were displayed the specimens illustrating the foliage, flowers 

 and fruit of the forest trees. In recognition of the importance 

 of the work of Dr. Mohr in these collections illustrating 

 the botany of the State, the herbarium has received the title of 

 'the "Mohr Herbarium/' 



During these years also, in connection with the Forestry 

 Division, were prepared his great work on the Pines, publish- 

 ed in 1896, and his monographs on the Cypress, the Juniper, 

 and the Red Cedar, which are now in press. Monographs on 

 the hard wood trees were to follow next, the first of the series 

 being that on the Oaks, which he had just completed when he 

 died. 



