3
votes
2answers
122 views

Is there a book containing references to contemporary responsa according to the order of the Shulchan Aruch?

Is there a book containing references to contemporary responsa (maybe think starting from around the time electricity became common until now) according to the order of the Shulchan Aruch? I tried to ...
2
votes
1answer
153 views

Rif, Rosh, and Rambam about the Techelet

The Petil Techelet company (I believe) makes three types of colored strings: Raavad- 1 full string of blue Tosafot- 2 full strings of blue Rambam- 1/2 string of blue Does the Rif or Rosh mention ...