Is it not demonstrated that a true flying machine, self-raising, self-sustaining, self-propelling, is physically impossible? — Joseph LeConte Copy Share Image
One: There is a low limit of weight [of about] 50 pounds beyond which it is impossible for an animal to fly. Two: The… — Joseph LeConte Copy Share Image
It is true that the trees are for human use. But these are aesthetic uses as well as commercial uses-uses for the spiritual wealth… — Joseph LeConte Copy Share Image
There is nothing which Nature so clearly reveals, and upon which science so strongly insists, as the universal reign of law, absolute, universal, invariable… — Joseph LeConte Copy Share Image
Is it not demonstrated that a true flying machine, self-raising, self-sustaining, self-propelling, is physically impossible? — Joseph LeConte Copy Share Image
![“One: There is a low limit of weight [of about] 50 pounds beyond which it is impossible for an animal to fly. Two: The animal machine is far more effective than any we can hope to make. Three: The weight of any machine constructed for flying, including fuel and engineer, cannot be less than three…” quote by Joseph LeConte](https://sms4smile.com/quotes/img-quotes/296/joseph-leconte-73855_animal_one-there-is-a-low-limit-of-weight-of-ab_585346.jpg)
