Which Haydn Symphonies are composed just for strings?

Joseph Haydn composed several symphonies for strings, notably the "Symphony No. 1 in D major," "Symphony No. 2 in C major," and "Symphony No. 3 in G major." These early symphonies are characterized by their light orchestration, typically featuring only string instruments without woodwinds or brass. They reflect Haydn's innovative style and set the foundation for his later, more complex symphonic works.