The diving suit "invented" by Professor Wickwire is the standard diving dress created by Augustus Siebe in the 1930s".
Wickwire's inventions are intended to anachronistic - it's a running gag throughout the series.
The diving suit "invented" by Professor Wickwire is the standard diving dress created by Augustus Siebe in the 1930s, long before the show's 1893 setting.
After getting bucked off of Comet, Pete calls the horse a "pachyderm". Pachyderm refers to elephants, rhinoceroses, and hippopotamuses.