What size (dimensions) is the negative?
If a reasonable size (they were often 3 x 2 inches or even bigger) then probably it is possible to use a scanner and then electronic image reversal back to a "positive" that can be printed. I have done that with some old 35mm negatives. The quality is not good with 35mm but should be acceptable for a larger glass negative
5 Precepts of Buddhism seem appropriate. Refrain from taking life. Refrain from taking that which is not given. Refrain from misconduct. Refrain from lying. Refrain from intoxicants which lead to loss of mindfulness