Burette with a vertical inner rod A that opens and closes the lower opening (left). Burette with a dark strip along the graduation, for a better reading of the meniscus (right).
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Alessandri, P. E. Analisi Volumetrica Applicata Ai Prodotti Commerciali e Industriali; Ulrico Hoepli: Milano, 1895. OCLC: 635717336