What did Phillis WHeatley mean when she said "Remember, Christians, Negros, black as Cain/May be refin'd, and join th' angelic train?"

"silence" is the answer to this riddle.

the best practice

1. keep your workspace clean

2. wash your hands

3. seperate and clean chemicals and equipment

4.   use microfiber cleaning utensils

5. clean and sanitize all work surfaces

hope this !

is it "means of nourishment"

it could change in many ways and by that i mean income can go lower or higher depending on how hard you work. i hope this .