SYMPATHETIC CELLS: NORWAY RAT aie) 
individual data are on file in the archives of The Wistar Institute 
and available there for reference. 
The values for the diameters of the cells and their nuclei are 
the averages of measurements on the twenty largest cells in each 
ganglion. ; 
GROWTH OF THE CELLS 
A. In relation to body weight 
The computed diameters of the cells and the nuclei of the 
eighty-five cases have been condensed to thirteen groups for 
se YSIS a a a ed hehe Sa fed SSE 
Diameters of Cells and Nuclei in micra [7] |_| REET ESE eRe 
pep al sles 
oS an See ata ees EE RRPeReeaees 
san beeeeereeeeeettneee= ca SSS Lai 
30 
| | 
BERG SESaaR eee 
Se eS ok z= SSE EEE ER 
— ee 
BERR eerer aan tie CL EE eee 
Remnant non ooo rab [alot 
ae i) fr ff ea lhe ae att et 
BREE EEE EEE EERE pet 
peice enlace fey oie PT LIE hdeted 
0 50 100 150 200 250 300 350 
Chart 1 Based on table 1 and giving the computed diameters of the cells 
and their nuclei according to sex—on body weight in grams. Wild Norway rat. 
Males Females ---------- 
each sex and arranged according to body weight as shown in 
table 1. From these data chart 1 was plotted. 
The graphs in chart 1 show both the cell bodies and the nuclei 
as growing rapidly up to a body weight of 15 grams, but after 
that period they grow more gradually. The graphs for the 
males and females run close together at all body weights, and 
there is no indication of the difference according to sex shown in 
chart 2 for the Albino (Ping, ’21). 
