Slide showing a table of 'analyses of the gases of the accessory respiratory organs of some freshwater fishes'. Slide shows 'analyses of the gases of the accessory respiratory organs of some freshwater fishes'. Title is given above table. Table is composed of three main columns: organ, species, and average composition of gas. The first column includes 'air bladder', 'stomach' and 'intestine'. The second column has the following species: 'Erythrinus', 'Lepidosteus', 'Ancistrus', 'Hoplosternum' and 'Misgurnus'. The third column is further divided into 'percentage of oxygen' and 'carbon dioxide' which are further divided into 'normal' and 'suffocated'. There is a note below the table which reads: '1) Between inhalations 2) Immediately following inhalation.' Late 19th to early 20th century