Gravitational shielding
One of the first and best known examples is the fictional gravity shielding substance "Cavorite" that appears in H . G . Wells's classic 1901 novel "The First Men in the Moon" . 
<triplet> H. G. Wells <subj> The First Men in the Moon <obj> notable work <triplet> The First Men in the Moon <subj> H. G. Wells <obj> author <subj> 1901 <obj> publication date