Edward Jenner as Naturalist. 
55 
represents the progress of the ovum of the domestic hen, 
from its first impregnation to its full and complete devel¬ 
opment when about to be discharged. The vascularity of 
the membrane investing the ova, as well as the internal 
condition of the oviduct where the shell is formed, are 
clearly shown. It was undoubtedly in such embryological 
researches that he used to delight when with Hunter. Nat¬ 
urally quick to observe, his power of perception had been 
increased and strengthened. Prone to interpret, his facul¬ 
ties of induction, or reasoning from particulars to generals, 
from the individual to the universal, from a part to the 
whole, and of deduction, the reaching a conclusion from 
certain given premises, had been greatly developed. Ready 
to see with eyes that were really sightful, and to under¬ 
stand with a mind that was ever open, and to combine 
what to most men always stood dissevered, and to separate 
into their natural parts or groups what to the untrained 
seemed inextricably confused, Jenner had been as plastic 
clay under his master’s hand. His most salient traits as a 
naturalist were brought into even bolder relief. From what 
we know of Hunter’s daily life and pursuits, we are made 
as certain of Jenner's constant occupations and mental de¬ 
velopment while in his long pupilage and comradeship. 
To Jenner’s latest day he always called him “that dear 
man.” 
That Jenner should have declined such an invitation as 
this to join Hunter, so in harmony with all his tastes 
and previous training, is probably not to be explained by 
his modesty and love of the country alone. He doubtless 
already perceived, though as yet as in a vision, what he 
was eventually to accomplish, and deliberately placing aside 
the tempting offer, consecrated his life afresh to the de¬ 
velopment of his fond idea. 
From the commencement of his settlement at Berkeley, 
where he soon received the offer of an important and lucra¬ 
tive appointment in India, which like that proposed to him 
by Hunter he declined, John Hunter compelled him, as it 
