PROGRESS OF MICROSCOPICAL SCIENCE. 213 
the process of drying, my investigations were made upon portions of 
. slides where the corpuscles were very sparsely disseminated, and then, 
to secure the most infallible accuracy for my deductions, as the pre- 
paration was moved along, I measured every isolated circular red 
disk which came into the field of the microscope. In doing this I 
cautiously avoided recording those which manifested even slight 
departures toward an oval form, and by several experiments learned 
that the deviation corresponding to a transverse diameter of 5,),, and 
a conjugate of 5,!;, of an inch was recognizable by a single glance. 
One hundred corpuscles in each specimen were measured and the 
dimensions as I read them off in millionths of an inch noted down 
generally by an assistant. These memoranda, with the preparations 
to which they refer, are carefully preserved for examination by any 
experts who may desire to convince themselves respecting the sub- 
stantial foundation of fact whereon I base my conclusions.” Here 
follow the several results, which have been put in a more convenient 
form by the editor of the ‘American Naturalist’ (March 1877) than 
they have in the original paper : 
~ if re aga 2 3/8 
& tS) = ra og SEs od 
NATIONALITY OF & | Le SE | Ag Az leu8| sto lecs 
SUBJECT. oa og oe g B g& | e888] on8| 088 
S | tel i irshies a5 = | wo | wa 
Gilat, (ee: tars lalieo. ue suns S eae el 
sare F sinlgtl oe 4 vines | g57| 33 
e GeaPnes cpaer stank 
Japanese Sel LOO Esa eon e 23787) eS ele so ag 
Spanish .. .. | 30| 100 |1-3296/1-2777|1-3571/ 6 | 89 5 
Belgian .. .. | 88] 100 | 1-8203/1-2777|1-3846| 7 | 88 5 
Swiss .. .. .. | 40 | 100 | 1-3203/1-2857|1-4000| 7 | 82 | 11 
Turkish .. .. | 29 | 100 |1-8197|1-2777|1-3846| 4 | 80 | 16 
Danish .. .. | 25| 100 | 1-3257|1-2857|1-4000; 12 | 82 6 
RUSstane ee altel On I—St9Oy 1 ~2857 | 1-3971 Ae oy 7 
Norwegian .. .. | 35 | 100 | 1-8252 | 1-2857| 1-4000; 10 | 86 4 
Swedish .. .. | 33| 100 | 1-8254/1-2777/1-8737/ 13 | 82 5 
Italian .. .. | 35 100 |1-3272|1-2777|1-4000| 10 | 83 7 
French .. 67 | 100 | 1-3239 | 1-2777| 1-8737| 12 | 80 8 
al 52 | 100 |1-3229|1-2857|1-3856| 11 | 83 | 6 
Cherokee Indian;\) 4g | 400 | 1-3215|1-2857/1-4000/ 10 | 83 | 7 
born in U.S. .. f| | 
English  parent- 9791 | 1.9777 | 1_294@ | 
Le ere | 40 | 100 |1-8191|1-2777|1-3846| 6 | 85 9 
Total .. | .. | 1400 | 1-3224 | 1-2777|1-4000} 8 83 9 
“ Combining these deductions, we find that of the wae 1400 cor- 
puscles each separately measured, the SEE Was s5'sy (°007878 
mm.), the maximum ;,/,,, and the Sen FO00, of an inch; 1158 
or 83 per cent. measured between 7,5 and x9 of an inch in 
diameter, and consequently under a power of 200 would appear about 
