माखासे बोसोरनि उनाव सर जन हार्शेल ( Sir john Herschel ) नि गेजेरजों मोनसे रासायन सडियाम थायो-साल्फेट ( Sodium Thio-Sulphate ) नि नागिरनायजों बे जेंनानिबो गोजोर समाधान ओंखारो ।
After few years , this problem was permanently solve with a invention by Sir John Herschel of a chemical Sodium Thio-Sulphate .