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INSTRUCTIONS 



I'RKPARED BY I)H WRIGHT, 



FOR A PERSON ABOUT TO SAIL FOR THE 

 EAST INDIES AND CHINA. 



1. Mark the thermometer daily during the whole voyage, 

 especially in passing and repassing the Line, for at least 15 

 degrees. 



2. Preserve any birds that may be shot in the voyage, 

 particularly any land-birds that may come on board. 



3. Preserve flying-fish by drying ; also the heads, jaws 

 and teeth of any large fishes caught in the voyage. 



4. Take up, by the bucket, any sea-weeds on the surface 

 of the sea. Amongst these are often found cancers, asterias, 

 shells, &c. which should be carefully preserved. Mark the 

 latitude and longitude where found. 



5. Mark the latitude where you first see the tropic bird, 

 the albitross, the Cape petrel, and other birds which inhabit 

 particular tracts of the ocean. 



6. Preserve carefully in spirits, medusae, cancers, or other 

 sea animals, or animalcula?, that are luminous in the dark, and 

 the latitudes where found. 



7. Wherever the sea is discoloured, endeavour to ascer- 

 tain the cause of it, by examining the water, and the animal- 

 cula? found in it. 



8. Preserve whatever plants you find in fructification. The 

 plants in most request are those of the class Cryptogamia, 

 being also the easiest, viz. all the fern tribe, lichens, and mus- 



