Where a bequest imposes an obligation on the legatee, he can take nothing by it unless he accepts it fully.
     Illustration
     A, having shares in (X), a prosperous joint stock company and also shares in (Y), a joint stock company in difficulties, in respect of which shares heavy calls are expected to be made, bequeaths to B all his shares in joint stock companies; B refuses to accept the shares in (Y). He forfeits the shares in (X).