Text: at the same time, the subject matter ... is chosen so that ... all the most generally useful fundamental ideas of the science of waves in fluids can be developed at length, one after another.

Correct capitalization: At the same time, the subject matter ... is chosen so that ... all the most generally useful fundamental ideas of the science of waves in fluids can be developed at length, one after another.

Text: skip to secondary content

Correct capitalization: Skip to secondary content

Text: program modification: sometimes, not only virus worm:win32/bagle.gx@mm or malware max secure registry cleaner but also common softwares possessing the ability to modify the inner functions of cnb_0324.dll, which means other programs can't find this dll file again.

Correct capitalization: Program Modification: Sometimes, not only virus Worm:Win32/Bagle.GX@mm or malware Max Secure Registry Cleaner but also common softwares possessing the ability to modify the inner functions of CNB_0324.DLL, which means other programs can't find this DLL file again.

Text: they nodded in agreement and wondered what the problem was. "well", he continued, "some receipts are being copied by counterfeiters.

Correct capitalization:
They nodded in agreement and wondered what the problem was. "Well", he continued, "some receipts are being copied by counterfeiters.