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pH TEST PAPER: LITMUS<br />
(1 of 2) <br />
Before Test<br />
Blue litmus on bottom

Fphoto-25318910B-2RM.jpg

pH TEST PAPER: LITMUS
(1 of 2)
Before Test
Blue litmus on bottom

Copyright:© 1989 Richard Megna - Fundamental Photographs

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Richard Megna
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