On the Problems of Engels' Reading of Marx's Philosophy

In Engels' reading of Marx's Philosophy,he thinks that the law of dialectics exists in nature,and that the materialist theory of reflection is right in epistemology,and that social economical structure determines the social consciousness.Marx and Engels have different opinions in philosophy,and Engel's explanation to Marx is not identical with Marx's true meaning.Some problems of Engels' reading of Marx's philosophy exist:first,he extends dialectics to nature;second,his materialist theory of reflection is not radical in epistemology;finally,he has the inclination of economical determinism in theory of history.