During the experiment, you adjusted the length of the rheostat LL6 so that 1 glow flowed through bulb H. Now that we have seen that the (conduction) current measured by a DMM corresponds to the same physical concept as ‘glow’, it makes sense to ask "what current goes through bulb H when 1 glow goes through bulb H?" The consensus in the past has been about 30 mA but you might have been using a slightly larger or smaller current. Remember that you assumed that the bulbs in circuit 7 were identical. If the resistance of rheostat LL6 has been adjusted so that 30 mA flows through bulb H then what current flows through bulb B? What current flows through bulb C?