This investigation is now extended to the parent substance, tetracycline, with the results shown in Table 1, which also includes some new values for the substituted tetracyclines.

Results in 10 out of 12 malformation subgroups supported the safety of tetracyclines. The two exceptions were possible excess ...

and persisting in the zone of localization until the structural remodelling has caused the absorption of the bony areas which have bound the tetracyclines. This observation seemed likely to offer ...