How do you develop photographs from antique glass slides?
from the positive. Prints are then made from the internegative. I do not know of any direct positive (positive to positive) black and white paper, and if there was one it’s surely not made now. There were direct positive color papers made for making prints directly from color slides without an internegative, and such a paper might work with a glass lantern slide, but you’d need a professional photo laboratory in any case unless you have access to a color lab.