mouths er years.
d) The platelet count, unlike the fluctuating
tetal lewkecyte count, falls in s regular fashion
aad reaches a low on the XUth day. Some recovery is cvident early; however, as with the
ether elements, recovery may not be complete
several months after exponure.
4. As an index of severity of exposure, perticularly in the sublethal range, the total white
or newtrophile counts are of limited usefulness
because of wide fluctuations and because several weeks may be required for maximum depression to become evident. The lymphoryte
coant is of more value in this regard, particnlarly in the low dose range, since depression
eccurs within hours of exposure. However,
since a marked depremsion of lymphocyte counts
erceurs with low doses and, since further in-
crease in dose produces litth more depression,
this index is of little value at the higher doses.
5. Platelet counts showed a regular pattern
of change in the present studies, with the same
time of maximum depression in all exposure
groups and with the degree of. depression
roughly proportional to the calculated doses.
It appears, therefore, that the platelet count
has considerable promise in the sublethal range
as a convenient and relatively easy direct
method of determining the degree of exposure.
References
1
Rrevher, G.. and Cronkite. F. Po: Murphology and
Enumeration of Human Platelets, J. of Applied
Pa parndogy. 3. WS, 1808).
2 Waleak, J.
en Ame wee
Applications of Bone Significance
Levetion, Annsls of Neth. stat. %: 48-108, 054.
4. Rearabeum, 6. : Tables for a Nonparacectric Test of
Dieperuien, Anacis of Noth. Sat... %: B-O,
TemR,
& Men, W. J.: The Statistical Mgn Test, J. Amer.
Stet. tesee., 41: SGT-A08, Des.
@ Queeeutite, M. W.: Acseriated Mensuremect, Chap
ter 3, Ordering Teet, Academéec Prem ier.. Pubiiahera, New York, 1902.
7. White, C.: The une of ranks in 0 test of signi
ceare fer comparing two trestascets, Biowrtrics
A:33 1982
& Moura, 1. K.: Nonparametric stetisticrs fer poycho
ingics! reavarch, Peprh. Boil. 50: 122. TORR.
®& Wintrove, M. M.: Clinical Hemetetegy, Lee and
Febviger, Phil. 1967.
16. Standard values in bleed, Air Force Techairal Be
port No. 6588, 1961. Pwhitehed by Naticani Acad
emy of Brirere.
11. Minot, G. BR. and Spertiag. RB. G.: The eect os
the blood of irradiation, espertaliy short-weve
length Roentgen ray therapy, im. J. Med. Sci. i168:
215, 1924.
12. Ouxhterere, A.W. ond Warren. 5.: Medics! e@erts
of the atomic bomb in Japan. McGraw-Hill Beok,
lec., Mew York. 1806.
13% LeRoy. G. V.: lematulegy of atomic bomb casealthes, ireh. int, Ved, sé: GBI, 18.
14 Jacobeoe, I. (0), Marks, FE. R.. sad Lorens, N.:
Hematotogical Fifects of ionising radiations, Rediology 52: 371, 1948.
Li. Cronkite, E. P.. and Brecher. A.: The protective
effect of granulocytes in radiation injury, ins.
NOY. bead. Net. 39: 815, 10.
14 Mnetl, Fo M.. and Newt. J. V.: Hematniogic studies
in Hiroshima aad a coatrol city two years after the
atomit bombing, .irck. iat. Med. ag: 3B, 1948.
17. \iinaeeive. Yo: Hematotegte stedies of trradtated
survivors ia Hiroshima, Japan, Arch. [et, Wed. $f:
310, Hh.
1%, Hewpelwana, 1. H., Linco. HL, and Hoffman, J. Q.:
The acute radiation syodrome: A atudy of nine
canes and a review uf the problem, iva. Int. Med.
Je: J7R, 1
19. Hastetriik, R. J.: Cates! repoect of fuer individuats
accidentally e<poeed to gamma radiation and seutrons, Argonne Nativeal Laboratory, Jaa. 100%
WB. Croakite, EP. and Brecher, G.: Defects in bewo-
Tests for the Median Which Are Valid Under Very
stasis preinceed by wholiebudy irradiation, Jusiab
(emeral Conditions, J.
Macy, Jr.
Foundation, Trassactions of the afth
cusfereece ca blond coagulation, New Vorn, 1962.
vo, Tieete
-
EL:
3. Reweoboum, £8. : Tabée fer « Nenpasumstric Test of
diser Nfat. lseor.,, 44: 342-
a eee
or mere. The initial rise in tetel white count
is dus te a newtrephilic leubecytosn.
e) The drep m lymphocytes is carly and profound. Litie or ne evidence of recovery may
be apparent several months after exposure, and
wecre te nermal icveis may not occur fer