528 
IOWA ACADEMY OF SCIENCE Vol. XXIV, 1917 
* chiefly genera of Gray’s Manual 1 , on the seed coats of the genus 
Euphorbia 2 , on the seeds and testa of some Cruciferae 3 , on the 
structure of the testa of several leguminous seeds , 4 on some meth- 
ods in the study of mature seeds; 5 ' on the seed coats of C rot alarm 
sagittal is and Astragalus mollissimiis 6 , on the histology of the 
caryopsis and endosperm of some grasses 7 , and on the char- 
acters of weed seeds 8 . P. II. Rolfs has reported on the seed 
coats of Malvaceae 9 , and the seeds of Berberidaceae have been 
studied by Pammel, Burn ip and Thomas . 10 Winton and Moel- 
ler 11 dircussed the microscopy of vegetable foods. Hanausek, 
Winton and Barber 12 have a similar discussion in The Micro- 
scopy of Technical Products ; A. J. Pieters and V. K. Charles 13 
have reported on the seed coats of certain species of the genus 
Brassica. while Winton 14 has discussed the anatomy of weed 
seeds. Emma Sirrine 15 has worked on the structure of the seed 
coats of Polygonacese. Kramer’s Pharmacognosy 10 is another 
textbook covering this subject. 
Three of the most important European treatises on the sub- 
ject are TIarz, Landwirtschaftliche Samenkunde ; Tschirch, A., 
and Oesterle,. Anatomischer Atlas der Pharmakognosie und 
Nahrungsmittel ; Wiesner, Die Rohstoffe des Pflanzenreiches. 
m. H. Pammel, Trans. Acad. Sci. St. Louis, 9, 90-273, pi. 7 -35. This paper 
gives an extensive literature. 
2 Trans. Acad. Sci. St. Louis, 5, 543-568, pi. 12-U f . 
3 Am. Mo. Mic. Jour.. 18, 205., 269, 312, 2 pi., 2 figs.. Bull. Ia. Agrl. Exp. Sta, 
4 Bull. Torrey Lot. Club. 13, 17-24, pi. 52-53. 
5 Jour. Appl. Micro., /, 37-39, 6 figs. 
c The Biennial Rep. Ia. State College and Farm, 13. 47-48. 
7 Trans. Acad. Sci., St. Louis, 8, 199-220, pi. 17-19. See also Bull. Iowa 
Geol. Survey, 1, 525. 
s Charlotte M. King and L. H. Pammel, Weed Flora of Iowa, Bull. la. 
Geol. Survey, 4, 505-587, figs. 383-442. This paper contains a bibliography. 
9 Bot. Gazette, 17, 33-39, pi. 3. 
10 Froc. Ia. Acad. Sci., 5, 209-223, pi. 12-16. 
n English translation of Josef Moeller, Mikroskopie der Nahrugs u. Genuss- 
mittel aus dem Pflanzenreiche. 
12 John Wiley and Sons, New York, 1907. 
13 Bull. U. S. Dept. Agrl. (Bur. PI. Ind.), 29, 19. 
14 Rep. Conn. Agrl. Exp. Sta., 1902, 345-358. 
15 Proc. Ia. Acad. Sci., 2, 128-134, pi. 7-9. 
16 A text book of botany and Pharmacognosy, Lippincott, 190'7. 
