Copy 1
The naturalist's and traveller's companion, containing instructions for discovering & preserving objects of natural history and for promoting inquiries after human knowledge in general / [Anon].
- John Coakley Lettsom
- Date:
- 1774
Licence: Public Domain Mark
Credit: The naturalist's and traveller's companion, containing instructions for discovering & preserving objects of natural history and for promoting inquiries after human knowledge in general / [Anon]. Source: Wellcome Collection.
98/128 page 72
![[ 7* ] 8. It is a common opinion, that large quan¬ tities of remnants and rags of all kinds of fear- let cloth, are yearly carried from England to China, and that the Chinefe extract from them their fine red pigments. If this be true, what methods are employed to extract the color ? 9. It has been obferved that analogous fub- ftances are moft proper for dying homogenous bodies (/) *, thus animal fubftances are beft for dying wool and filk, becaufe wool and filk are animal fubftances. A blue dye, made of woad (Ifatis of Linnaeus) is found to be full of infects. Is it not the fame cafe with indigo ? Are not all the lafting dyes made from animal fubftances5 or of fuch as contain numerous infects ? 10. The manner in which the beft indigo is manufactured in the interior parts of Indoftan, and the plant from which it is made. Is it from the Indigofera or the Anil ? Are there any rules to afeertain when the plant has foaked fufficient- ly, and how long it ought to be beaten ? 11. Is there any linnen made of flax or hemp, or what other fubftances are fpun and wove in India befides cotton ? What ufe is made of the yellow or brown cotton taken from the Bombax ? Is it manufactured for apparel, and appropriated for a certain order of men, as priefts or Bramins ? 12. Defcriptions and drawings of the inftru- ments and machines employed by the Chinefe and Indians to clean the cotton from the feeds. 13. Is only European zaffer from cobalt ufed by the Chinefe for painting their porcelain (/) Vid. hiltoire de Pacademiej, an. 1768. art. 11. blue.](https://iiif.wellcomecollection.org/image/b30511495_0001_0098.jp2/full/800%2C/0/default.jpg)
