Sentence:  As if all Light of Reasoning were so shut up in "Clavius" his Brain, that because he does not see, the rest of Mankind must be blind; and what is that way of Reasoning that he betakes himself to, but by huddling the Principles of Geometry into Confusion, without order of method of Reasoning, to make a Conclusion, like a <WSD>"Dutch" Reckoning</WSD> of "Allem-al"<!--sic-->? 
Meaning of the word marked with <WSD> tags:  A (falsified) bill that is not itemised, and that is unjustifiably high.