400 
LINNAEUS IN 1735 . 
Harderwyk , August 1, 1735., 
ON the 23d of June, Charles Linnaeus made his dissertation 
at this university, for the purpose of obtaining his degree of dodtor 
of medicine. T n this dissertation, which is entituled Hypothesis de 
Jebrium inter ntium causa , the author founded every thing upon 
observations and experiments; and having resided in the northern 
parts of the world, he made his remarks upon what chiefly attracted his 
notice in those quarters. 
This celebrated physician put to press at Leyden his Systema 
Natures, of which one half is already printed off. It consists only of 
seven sheets in large folio, and contains an uncommon number of ob- 
servations. 
He founded the system of the mineral reign upon principia docimas- 
tica. The genera concretorum et petrijicatorum have been so arranged by 
him, that it appears impossible to add a single genus , He expatiates a 
great deal on the generation of stones, and states especially, that they 
are all either primordial like th eglarea and argilla , or produced by time 
like humus, ochra and arena. He has added the generical characters to 
all the genera, which has never been done in mineralogy, which science 
may by this means be easily acquired at the expiration of a few hours 
study. 
He divides the vegetable reign according to a new system, borrowed 
from the sex of the plants. He has more real genera, inserted in their 
proper places, than any other systematist ever had. All the general 
* See Hamburgische Beruhten, Hamburgh , 173s, No. 75, page 617. 
methods 
