[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Archaeology, epigraphy and coins](https://indike.org/pramana/ins.epigraphy) › [Book of Indian Eras, with Tables for Calculating Indian Dates](https://indike.org/pramana/ins.epigraphy.cunningham-1883) › c7.16 # Book of Indian Eras, with Tables for Calculating Indian Dates c7.16 Book of Indian Eras, with Tables for Calculating Indian Dates c7.16 - **Language:** English ### [c7.16](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.16) In these last two methods the multiplying by 11 and then by 4 of the first is equivalent to multiplying by 44, which is exactly double the multiplier 22 of the second; just as the divisor 3750 of the first is double 1875 of the second. In other words, (11 × 4)/3750 = 22/1875. There is a slight difference in the Kshepa, or addition, as the half of 8589 is 4294½, or a little more than 4291. As James Prinsep has remarked, the factor 22/1875 "is equivalent to dividing by 85·227, the period when a year is to be expunged by this system." - [Previous: c7.15](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.15) - [Next: c7.17](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.17) - [Up: c7](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7) --- Source: [https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.16](https://indike.org/pramana/ins.epigraphy.cunningham-1883.c7.16) · Pramāṇa