Complex sentence: In 1875 he went to see Thomas Moy's Aerial steamer at the Crystal Palace, this woefully underpowered machine illustrated many interesting design features and on demonstration may have achieved a brief hop into the air (accounts vary).
Split into simpler sentences: In 1875 he went to see Thomas Moy's Aerial steamer at The Crystal Palace. This woefully underpowered machine illustrated many interesting design features and on demonstration may have achieved a brief hop into the air (accounts vary).