| http://www.w3.org/ns/prov#value | - This preferably is employed in the commercial form in which it is mixed with a litmus agent so that it will turn from blue to pink, when it has picked up all the moisture which it can hold. in use, if a person wants to administer the penicillin, or other therapeutic agent to a patient, or if the patient wishes to administer it to himself, the end 23 of tube 20 may be placed in one nostril of the p
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