What did Washington mean when he told the officers give the world another subject of wonder?

What is the structure of nylon 66? What countries border Guatemala and the Pacific Ocean? Who lives in the Sahara Desert? Why is the desert in Arizona called the Painted Desert? Is it more expensive to order prefabricated trusses and get a crane or build the trusses on site? What are the seas and oceans near Greece? Why is there no coal on the moon? How many museums are in Berlin? What land in the east is bordered by the yellow sea? When did mark inglis climb Everest? Does the volga river cause major or small floods? How did the missionaries in san juan capistrano built their water supply? Are the Harry Potter and the Dueling Dragon rides the same? What tropical rainforest does aloe vera located in? What year did People began settling the Tigris and Euphrates river? Why did they build a dam across the rivers that fed the aral sea? Staring at an object causes it to disappear? What are some examples of Museum exhibits in the US? What causes ocean floors to expand? What is the adaptation of an animal?

What did Washington mean when he told the officers give the world another subject of wonder?