BA has MW 225, so you need 337,5 mg for preparation of 100 ml. I
recommend you to dissolve BA in little 15% KOH in distilled water and
mix it into lanolin melted in a water bath (about 60 0C). I dont know
the Reiss4 experiment, but I suppose you will need also IAA lanolin
paste. In this case I can recommend 1% IAA, because this concentration
will safely restore apical dominance applied on the stump of
decapitated pea plants. Dissolve the IAA in a small amount of ethanol
and mix it into melted lanolin (do not heat excessively, because IAA
would decompose).