to detect the fraud.

TABLE ILLUSTRATIVE OF THE SIZE AND FORM OF THE STARCH GLOBULES OF
VARIOUS PLANTS.

1. Tous-les-mois (_Canna coccinea_).--Grown in Grenada, 1-300 to
1-2,000 of an inch; general size, 1-500; form of the globules, large,
elliptical and ovate, and remarkably transparent.

2. Ditto ditto (species unknown).--From a plant grown in the garden of
the Hon. J. Croal, Georgetown, but gathered before the root was fully
ripe; globules spherical, shortly ovate and elliptical; size, from
1-600 to 1-1,600; general size, 1-800.

3. Buck Yam (_Dioscorea triphylla_).--Grown on the banks of the
Demerara River. Form of globules, elliptical, often truncated at one
end, so as to be mullar-shaped, some pear-shaped; length, twice the
width; size, 1-600 to 1-2,000; general size, 1-800.

4. Common Yam (_D. sativa_).--Grown on No. 1 Canal, Demerara River.
Elliptical, some long elliptical; size, 1-700 to 1-2,000; general
size, 1-1,000.

5. Guinea Yam (_D. aculeata_).--Grown in the same locality. Larger
globules, elliptical; smaller ditto, spherical, often truncated; some
shortly ovate, with the appearance of being flattened; general size
and range, same as No. 4.

6. Barbados Yam, grown on banks of Demerara river. Globules,
pear-shaped and mullar-shaped; range, 1-700 to 1-1,600; general size,
1-1,000.

7. Plantain (_Musa paradisiaca_).--Grown on the banks of the Demerara
river. Globules long and narrow, generally long elliptical, often more
acute at the ends than in any other species, some linear ended
abruptly; length, often three times the width; range, from 1-400 to
1-4,000 of an inch; general size, 1-800.

8. Potato (_Solanum tuberosum_).--Irish tubers, from Belfast Sound.
Globules, 1-600 to 1-2,000; general size, 1-1,200.

9. Potato (Commercial).--Locality unknown. Range from 1-600; globules
generally same as former, but a few stray ones as large as 1-40 of an
inch.

10. Sweet Potato (_Convolvulus Batatas_).--Grown at the Lodge,
Demerara. Form of globules, spherical aggregated; range, 1-1,000 to
1-4,000; general size, 1-2,400.

11. Arrowroot (_Maranta arundinacea_).--Specimens from Bermuda, where
the highest priced and best quality is prepared. Ovate and elliptical;
length in the larger globules, twice the width; range, from 1-800 to
1-2,400; general size, 1-1,400.

12. Ditto ditto, grown on plantation Turkeyen, Demerara, by J.W. King.
Size and description same as No. 11.

13. Ditto ditto, grown and p