AUTHOR’S ABSTRACT OF THIS PAPER ISSUED 
BY THE BIBLIOGRAPHIC SERVICE, SEPTEMBER 26 
ON THE GROWTH OF THE LARGEST NERVE CELLS 
IN THE SUPERIOR CERVICAL SYMPATHETIC 
GANGLION OF THE NORWAY RAT 
CHI PING 
The Wistar Institute of Anatomy and Biology 
FIVE CHARTS 
INTRODUCTION 
This study is a continuation of my first work ‘‘On the growth 
of the largest nerve cells in the superior cervical sympathetic 
ganglion of the albino rat from birth to maturity” (Ping, ’21). 
In that paper the significance of the age, the size of the animal, 
and of sex on the growth of the cells was examined, and an un- 
expected difference in the size of these cells was found in the 
‘inbred’ as contrasted with ‘standard’ strain of Albinos. It 
was deemed important, therefore, to examine the Norway rat 
in the same way in order to determine how the size and the 
growth changes in these cells were related in the wild Norway 
to those found in the two domesticated albino strains. 
MATERIAL AND TECHNIQUE 
The eighty-five specimens of the wild Norway used in this 
study belong to two groups from different sources. One group, 
comprising twenty-two individuals, was reared at The Wistar 
Institute, and the ages of these animals range from one day to 
134 days. 
The other group of sixty-three animals was collected from 
different localities in Philadelphia and its vicinity, and the ages 
of these are unknown. Their body weights range from 37 to 
402 grams, corresponding to ages from twenty days to three 
years, as generally estimated. 
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