on the threshold of life

circulation time measurement crop-tree thinning erl-king euchroic acid flat-tops gunzelling hrql image boundary magnetic basement make known Mannin L. mega midafternoon nitrocellulose-nitroglycerine mixture non-expansive fusion caking quick drying black lacquer recludes sodium p-benzylaminobenzene sulfonate two-dimensional chemical laser Tîchît Dahr